Issam Al Mughrabi, 56, who worked for the United Nations Development Programme (UNDP) for three decades was killed along with his wife and children in an Israeli air strike on Friday.

“For almost 30 years, Issam has worked with UNDP through our Programme of Assistance to the Palestinian People,” UNDP administrator Achim Steiner said in a statement.

“The loss of Issam and his family has deeply affected us all. The UN and civilians in Gaza are not a target.”

Offering his condolences to Issam’s family and colleagues the World Health Organization’s chief Tedros Adhanom Ghebreyesus stressed in a post on X that “humanitarians should never be victims” and called for a ceasefire.