Iranian Foreign Minister Mohammad Javad Zarif has condemned Israel’s killing of a young Palestinian paramedic near the Gaza fence as another stain of shame for the regime.

In a post on his official Twitter account on Sunday, Zarif also slammed the US’s veto of a UN Security Council resolution that condemned Israel’s use of force against Palestinians.

Razan al-Najjar, 21, a volunteer with the Gaza Health Ministry, was fatally shot in the chest on Friday while treating injured Gaza protesters in a medical staff uniform.

Palestinian Health Minister Jawad Awwad denounced Najjar’s killing as “a war crime” and a blatant violation of international rules, which protect paramedics and medical personnel at times of conflict.