Eitam Henkin, a man killed along with his wife in front of their children by a Palestinian in the West Bank last week, was an American citizen.

U.S. State Department spokesman Mark Toner confirmed the news in a statement this afternoon, hours after Israeli forces arrested the five Hamas terrorists responsible for the attack.

From the Associated Press: “On Thursday, two of the Palestinians fired multiple shots killing Eitam and Naama Henkin, residents of the West Bank settlement of Neria. Their four young children, including a four-month-old infant, were in the backseat of the car during the shooting but were unharmed.”

Henkin was born in Jerusalem, the son of US natives. He likely held dual US-Israeli citizenship.

Israel is in the middle of a days-long siege that has seen heightened clashes and tensions in the areas surrounding Jerusalem. Four Israelis have been killed, and at least three Palestinians.

There is no news yet on how the state department might respond.