The man accused of fatally shooting two staff members of the Israeli Embassy in Washington outside a Jewish museum told police after his arrest, “I did it for Palestine, I did it for Gaza,” federal authorities said Thursday in announcing charges in the killings they called a targeted act of terrorism.

Axar.az reports, citing AP, Elias Rodriguez, 31, shouted “Free Palestine” as he was led away after his arrest, according to charging documents that provided chilling new details of the Wednesday night shootings in the nation’s capital that killed an American woman and an Israeli man who had just left an event at the museum. They were set to become engaged.

Rodriguez faces charges of murder of foreign officials and other crimes and did not enter a plea during a perfunctory court appearance. Additional charges are likely, prosecutors said, as authorities continue to investigate the killings as both a hate crime against the Jewish community and terrorism.

The two people killed were identified as Yaron Lischinsky, an Israeli citizen, and Sarah Milgrim, an American.