NBC News' Chief Foreign Correspondent Richard Engel tweeted a picture of the Israeli military leaflet telling people to evacuate areas in north Gaza.
He said the leaflets are causing panic as people think an Israeli invasion on Gaza is imminent.
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.