Nadeem Siam Nowarah, 17, and Mohammad Mahmoud Odeh Abu Daher, 16, were both fatally shot in the chest with live ammunition outside of Israel’s Ofer military prison Beitunia. The video, obtained by Defence for Children International – Palestine Section (DCI-Palestine), shows “unlawful killings where neither child presented a direct and immediate threat to life at the time of their shooting,”according to Rifat Kassis, executive director of DCI-Palestine.

The boys were participating in a demonstration outside of Ofer military prison to commemorate Nakba Day and to express solidarity with the over 120 Palestinian prisoners on open ended hunger strikes against their administrative detention by Israel. The demonstration, which reportedly began peacefully, turned violent after Israeli forces clashed with Palestinian youth, according to The New York Times.

The deaths on Thursday raised the number Palestinian children killed by Israeli forces in 2014 to four, according to DCI-Palestine. Over 1,400 Palestinian children have been killed due to Israeli military and settler violence in the occupied Palestinian territory since 2000.