On 10 May militants fired 507 rockets and mortars at Israel, and Israel struck 158 Palestinian Islamic Jihad (PIJ) targets in Gaza. Twenty-five people have died and 76 injured in Gaza since 9 May, when Israel began its operation against PIJ with a series of strikes which killed three of its commanders. The PIJ is responsible for many recent rocket attacks on Israel. On 11 May Israel's military killed the commander of the PIJ and two other militants in a pre-dawn air strike on an apartment in Gaza. Later Israel’s sirens sounded as 10 mortars were fired from Gaza at Israeli communities in southern Eshkol. Some hit homes and buildings, but most landed in open areas or were intercepted. Prime minister Benjamin Netanyahu warned, ‘Israel's campaign is not over. We have hit PIJ with the most significant blow it has ever suffered’. PIJ threatened ‘dark days ahead' if Israel increased aggression.