'The attack is shocking,' Amnesty International said. 'There is no justification for the targeting of civilians.'

'Deliberately killing civilians violates fundamental principles of international law and we call on all Palestinian groups and individuals to cease such attacks immediately,' the organisation said.

'Israel and the Palestinian Authority have a responsibility to bring to justice people within their jurisdiction who ordered and facilitated the bombing,' Amnesty International said. 'In doing so they must act strictly in accordance with international humanitarian and human rights standards.'