Apple and Google are warning some U.S-based employees on visas against traveling outside of the country to avoid the risk of getting stuck coming back, as the Trump administration toughens vetting of visa applicants, according to recent internal memos from the tech companies that were reviewed by NPR.

U.S. consulates and embassies have been reporting lengthy, sometimes months-long delays, for visa appointments following new rules from the Department of Homeland Security requiring travelers to undergo a screening of up to five years’ of their social media history — a move criticized by free speech advocates as a privacy invasion.

For Apple and Google, which together employ more than 300,000 employees and rely heavily on highly-skilled foreign workers, the increased vetting and reports of extended delays were enough for the companies to tell some of their staff to stay in the U.S. if they are able to avoid foreign travel.

“We recommend avoiding international travel at this time as you risk an extended stay outside of the U.S.,” Berry Appleman & Leiden, a law firm that works with Google, wrote to employees.

The law firm Fragomen, which works with Apple, wrote a similar message: “Given the recent updates and the possibility of unpredictable, extended delays when returning to the U.S., we strongly recommend that employees without a valid H-1B visa stamp avoid international travel for now,” the memo read. “If travel cannot be postponed, employees should connect with Apple Immigration and Fragomen in advance to discuss the risks.”

Apple and Google declined to comment on the advisories, which were first reported by Business Insider.

It’s the latest sign of how the Trump administration’s aggressive immigration policies are affecting the foreign-born workforce in the U.S.

Earlier this year, the White House announced that companies will be subjected to a $100,000 fee for all new H-1B visas, a type of visa popular among tech companies eager to hire highly skilled workers from abroad.

H-1Bs typically last three years, and applicants have to return to an embassy or consulate in their home country for a renewal, but reports suggest such a routine trip could lead to people being stranded for months as a result of the Trump administration’s new policies.

On Friday, The Washington Post reported that hundreds of visa holders who traveled to India to renew their H-1Bs had their appointments postponed with the State Department explaining that officials needed more time to ensure that no applicants “pose a threat to U.S. national security or public safety.”

At Google, the Alphabet Workers’ Union has been campaigning for additional protections for workers on H-1B visas. Those workers would be particularly vulnerable in the event Google carried out layoffs, since losing employer sponsorship could jeopardize their legal status, said Google software engineer Parul Koul, who leads the union.

The need to support H-1B holders at Google, she said, has “only become more urgent with all the scrutiny and heightened vetting by the Trump administration around the H1B program, and how the administration is coming for all other types of immigrant workers.”

WASHINGTON — The Trump administration launched military strikes Friday in Syria to “eliminate” Islamic State group fighters and weapons sites in retaliation for an ambush attack that killed two U.S. troops and an American civilian interpreter almost a week ago.

A U.S. official described it as “a large-scale” strike that hit 70 targets in areas across central Syria that had IS infrastructure and weapons. Another U.S. official, who also spoke on condition of anonymity to discuss sensitive operations, said more strikes should be expected.

“This is not the beginning of a war — it is a declaration of vengeance. The United States of America, under President Trump’s leadership, will never hesitate and never relent to defend our people,” Defense Secretary Pete Hegseth said on social media.

The new military operation in Syria comes even as the Trump administration has said it’s looking to focus closer to home in the Western Hemisphere, building up an armada in the Caribbean Sea as it targets alleged drug-smuggling boats and vowing to keep seizing sanctioned oil tankers as part of a pressure campaign on Venezuela’s leader. The U.S. has shifted significant resources away from the Middle East to further those goals: Its most advanced aircraft carrier arrived in South American waters last month from the Mediterranean Sea.

Trump vowed retaliation

President Donald Trump pledged “very serious retaliation” after the shooting in the Syrian desert, for which he blamed IS. Those killed were among hundreds of U.S. troops deployed in eastern Syria as part of a coalition fighting the militant group.

During a speech in North Carolina on Friday evening, the president hailed the operation as a “massive strike” that took out the “ISIS thugs in Syria who were trying to regroup.”

Earlier, in his social media post, he reiterated his backing for Syrian President Ahmad al-Sharaa, who Trump said was “fully in support” of the U.S. effort.

Trump also offered an all-caps threat, warning IS against attacking American personnel again.

“All terrorists who are evil enough to attack Americans are hereby warned — YOU WILL BE HIT HARDER THAN YOU HAVE EVER BEEN HIT BEFORE IF YOU, IN ANY WAY, ATTACK OR THREATEN THE U.S.A.,” the president added.

The attack was conducted using F-15 Eagle jets, A-10 Thunderbolt ground attack aircraft and AH-64 Apache helicopters, the U.S. officials said. F-16 fighter jets from Jordan and HIMARS rocket artillery also were used, one official added.

U.S. Central Command, which oversees the region, said in a social media post that American jets, helicopters and artillery employed more than 100 precision munitions on Syrian targets.

How Syria has responded

The attack was a major test for the warming ties between the United States and Syria since the ouster of autocratic leader Bashar Assad a year ago. Trump has stressed that Syria was fighting alongside U.S. troops and said al-Sharaa was “extremely angry and disturbed by this attack,” which came as the U.S. military is expanding its cooperation with Syrian security forces.

Syria’s foreign ministry in a statement on X following the launch of U.S. strikes said that last week’s attack “underscores the urgent necessity of strengthening international cooperation to combat terrorism in all its forms” and that Syria is committed “to fighting ISIS and ensuring that it has no safe havens on Syrian territory and will continue to intensify military operations against it wherever it poses a threat.”

Syrian state television reported that the U.S. strikes hit targets in rural areas of Deir ez-Zor and Raqqa provinces and in the Jabal al-Amour area near the historic city of Palmyra. It said they targeted “weapons storage sites and headquarters used by ISIS as launching points for its operations in the region.”

IS has not said it carried out the attack on the U.S. service members, but the group has claimed responsibility for two attacks on Syrian security forces since, one of which killed four Syrian soldiers in Idlib province. The group in its statements described al-Sharaa’s government and army as “apostates.” While al-Sharaa once led a group affiliated with al-Qaida, he has had a long-running enmity with IS.

The Americans who were killed

Trump this week met privately with the families of the slain Americans at Dover Air Force Base in Delaware before he joined top military officials and other dignitaries on the tarmac for the dignified transfer, a solemn and largely silent ritual honoring U.S. service members killed in action.

The guardsmen killed in Syria last Saturday were Sgt. Edgar Brian Torres-Tovar, 25, of Des Moines, and Sgt. William Nathaniel Howard, 29, of Marshalltown. Ayad Mansoor Sakat, of Macomb, Michigan, a U.S. civilian working as an interpreter, also was killed.

The shooting near Palmyra also wounded three other U.S. troops as well as members of Syria’s security forces, and the gunman was killed. The assailant had joined Syria’s internal security forces as a base security guard two months ago and recently was reassigned because of suspicions that he might be affiliated with IS, Interior Ministry spokesperson Nour al-Din al-Baba has said.

The man stormed a meeting between U.S. and Syrian security officials who were having lunch together and opened fire after clashing with Syrian guards.