President Trump traveled to Delaware's Dover Air Force Base on Wednesday to pay his respects to a Navy SEAL who was killed during an anti-terror operation in Yemen.

Trump was on hand to receive the remains of Chief Petty Officer William “Ryan” Owens, 36, who was slain over the weekend in a raid on al Qaeda's Yemeni branch.

Sen. Chris Coons Christopher (Chris) Andrew CoonsConservative activist Lauren Witzke wins GOP Senate primary in Delaware Coons beats back progressive Senate primary challenger in Delaware Democrats back away from quick reversal of Trump tax cuts MORE (D-Del.) accompanied the president during the visit, which was closed to the press.

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Trump abruptly left the White House with his daughter, Ivanka, shortly before 3 p.m. to travel to the base. The visit was previously unannounced.

Reporters saw Trump's helicopter land at Dover at 3:51 p.m., with an Air Force C-17 transport aircraft arriving roughly 10 minutes later

Owens was the first U.S. service member killed in combat under the Trump administration. The president phoned his family to offer condolences on Tuesday, according to White House press secretary Sean Spicer.

Questions have been raised about the raid, which U.S. officials said left 14 al Qaeda fighters dead and resulted in the capture of sensitive intelligence.

The 8-year-old daughter of U.S.-born al Qaeda fighter Anwar al-Awlaki was also killed in the operation. Al-Awlaki, a former alleged top al Qaeda leader, was killed in a controversial drone strike in 2011.

White House officials have declined to comment on the death.

Updated: 4:26 p.m.