According to Israeli media, a rocket landed in an area north of Jerusalem but they will not say where for security reasons.
Hamas claimed responsibility for the rocket.
There are no reports of damage or injuries yet.
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.