“We are profoundly troubled by reports that he was severely beaten while in police custody and strongly condemn any excessive use of force,” Psaki said. “We are calling for a speedy, transparent and credible investigation and full accountability for any excessive use of force.”

“We reiterate our grave concern about the increasing violent incidents, and call on all sides to take steps to restore calm and prevent harm to innocents,” it added.

Khdeir, according reports in Orlando, Florida, is a high school sophomore in Tampa, who was visiting his Palestinian relatives in Shuafat, Jerusalem, for the first time in over a decade when he was beaten and detained.

The incident took place on Thursday outside the home of the murdered teenager, said to be his cousin. The Forward quoted the Council on American-Islamic Relations as saying that he suffered serious injuries in the beating and is being held under police guard at Hadassah Hospital in Jerusalem.

Khdeir is due to be brought before a judge in Jerusalem on Sunday, Ma’an news agency reported.

Two videos of the incident were posted online. One was shot by a neighbor and distributed to family and a television station, while the other was shot from the other side of the street and posted to YouTube.