A dozen members of Congress led by Sen. Bernie Sanders sent a Tuesday letter demanding the Biden administration open an independent investigation into an Israeli attack on journalists, including U.S. citizen Dylan Collins, in Lebanon last year.

Collins, a Vermonter working for Agence France-Presse, was the only American in a group of reporters who endured Israeli tank fire on October 13, 2023, just days after the Hamas-led attack on Israel. He and five others were injured, and Lebanese Reuters journalist Issam Abdallah was killed.

The journalists were covering cross-border fire between the Lebanese political and paramilitary group Hezbollah and Israeli forces—armed with diplomatic and weapons support from the Biden administration and Congress—during the early stages of a retaliatory assault on the Hamas-governed Gaza Strip for which Israel is now on trial for genocide.

“To date, Mr. Collins has received no explanation for the attack, and there have been no steps toward accountability,” the letter states, taking aim at Israel’s leader. “Given the inaction of Prime Minister Benjamin Netanyahu’s government, the United States must open an independent investigation into this incident.”