The latest incident followed an Israeli air force raid that killed two Salafist activists late Saturday. In both cases the victims were travelling on a motorbike.

Saturday's air strike on Gaza killed Jordanian national Sheikh Hisham al-Saedini, 43, also known as Abu Al-Waleed Al-Maqdissi, of the Mujahedeen Shura Council.

Activist Fayek Abu Jazar, 42, also died in the raid on the northern town of Jabaliya, the Palestinian security sources added.

A 12-year-old boy was among two other people who were wounded in that attack, according to Palestinian medical officials.

Hisham al-Saedini was head of radical Gaza Salafist group Tawhid wal-Jihad and one of the founders of the Mujahedeen Shura Council, a new Salafist coalition in the Palestinian enclave. He was considered one of the most important Salafist leaders in Gaza.