Israel released a Palestinian medic who has been held prisoner since soldiers killed 15 of his colleagues last month and buried them in a mass grave in southern Gaza.

Assad al-Nassasra was missing for weeks following last month's attack, in which 15 emergency workers were killed by Israeli troops.

Israeli authorities freed a Palestinian emergency responder who went missing in late March when 15 humanitarian workers were killed in Gaza in an incident that drew worldwide condemnation, the Palestine Red Crescent Society said on Tuesday.