Israel used a US weapon in a March airstrike which killed seven healthcare workers in southern Lebanon, according to a Guardian analysis of shrapnel found at the site of the attack, which was described by Human Rights Watch as a violation of international law.

Seven volunteer paramedics, aged between 18 and 25, were killed in the 27 March attack on an ambulance center belonging to the Lebanese Succor Association in the town of al-Habariyeh in south Lebanon on 27 March, the Guardian reported. 

The Guardian examined the remnants of a 500lb Israeli MPR bomb and a US-manufactured Joint Direction Attack Munition (JDAM) recovered by first responders from the scene of the attack. Pictures of the shrapnel sent by the Guardian were further verified by Human Rights Watch and an independent arms expert.

Human Rights Watch said that its own investigation concluded that the strike on the healthcare center was unlawful and should have implications for US military assistance to Israel.