An explosion hit a public bus in the heart of Tel Aviv on Wednesday, wounding at least 10 people, Israel's ambulance service reported.
"A bomb exploded on a bus in central Tel Aviv. This was a terrorist attack. Most of the injured suffered only mild injuries," said Ofir Gendelman, a spokesman for Prime Minister Benjamin Netanyahu.
Television showed pictures of a smoke-filled bus, with its windows broken.
The attack happened on the eighth day of an Israeli offensive against the Gaza Strip which it launched with the stated aim of preventing rocket strikes from the Palestinian enclave.
Celebratory gunfire rang out in Gaza City when local radio stations reported news of the Tel Aviv explosion.
The last time Israel's commercial capital was hit by a serious bomb blast was in April 2006, when a Palestinian suicide bomber killed 11 people at a sandwich stand near the city's old central bus station.