WASHINGTON — Charges against the man accused of shooting two National Guard members have been upgraded to first-degree murder after one of the soldiers died, the U.S. attorney for the District of Columbia announced Friday, while investigators continue to seek a motive.

Specialist Sarah Beckstrom, 20, and Staff Sgt. Andrew Wolfe, 24 were hospitalized in critical condition after the Wednesday afternoon shooting near the White House. Trump announced Thursday evening that Beckstrom had died.

U.S. Attorney Jeanine Pirro’s office said the charges against Rahmanullah Lakanwal, a 29-year-old Afghan national who worked with the CIA during the Afghanistan War, now include one count of first-degree murder and two counts of assault with intent to kill while armed.

Beckstrom and Wolfe were deployed with the West Virginia National Guard as part of President Donald Trump’s crime-fighting mission that federalized the D.C. police force. The president also has deployed or tried to deploy National Guard members to other cities to assist with his mass deportation efforts but has faced court challenges.

Trump called the shooting a “terrorist attack” and criticized the Biden administration for enabling Afghans who worked with U.S. forces during the Afghanistan War to enter the U.S. The president has said he wants to “permanently pause migration” from poorer nations and expel millions of immigrants from the country.

In an interview on Fox News, Pirro said there are “many charges to come” beyond the upgraded murder charge. She said her heart goes out to the family of Beckstrom, who volunteered to serve and “ended up being shot ambush-style on the cold streets of Washington, D.C.”

Pirro said officials have been working around the clock to determine the suspect’s motive. Investigators are executing warrants in the state of Washington, where Lakanwal lived, and other parts of the country.

Defense Secretary Pete Hegseth visited National Guard troops in the nation’s capital Friday and led them in a prayer for Beckstrom and Wolfe.

“Some of you may have known her,” Hegseth said of Beckstrom. “Obviously a beautiful human being and a great American willing to serve her country brutally targeted.”

Hegseth said he and his wife briefly visited Wolfe on Thursday night “to be there, lay hands on him, pray over him.”

Wolfe remains in “very critical condition,” West Virginia Gov. Patrick Morrisey said Friday. He ordered state flags to be flown at half-staff in recognition of Beckstrom’s death.

“Their courage and commitment to duty represent the very best of our state,” Morrisey said.

Lakanwal has been living in Bellingham, Washington, about 80 miles (130 kilometers) north of Seattle, with his wife and five children, said his former landlord, Kristina Widman.

Mohammad Sherzad, a neighbor of Lakanwal’s in Bellingham, told the AP in a phone interview Friday that Lakanwal was polite, quiet and spoke very little English.

Sherzad said he attended the same mosque as Lakanwal and had heard from other members that Lakanwal was struggling to find work. Some of his children attended the same school as Lakanwal’s children, Sherzad said.

“He was so quiet and the kids were so polite, they were so playful. But we didn’t see anything bad about him. He was looking OK,” Sherzad said. Sherzad said Lakanwal “disappeared” about two weeks ago.