Hamas's deputy foreign minister, Ghazi Hamad, has told the BBC's World Service:
It's crazy right now in Gaza - in the north in the south and in the middle.
They've targeted different places here including the buildings of the government, the security forces and cars in the crowded streets.
Today's bombing in Tel Aviv is reminiscent of six years ago and could mark a serious escalation in the conflict.
A truce in Gaza suits all sides but none of the groups seem interested in a long-lasting solution.
A complex system of air defences has been instrumental in protecting Israel's population from incoming rockets.