Twenty-one people have been injured in a "terrorist attack" on a bus in Israel's commercial capital Tel Aviv, Israeli officials say.
Of the 21 injured, three have received "moderate-light" injuries - including shrapnel wounds and burns - and were undergoing surgery, a spokesman for the Ichilov medical centre in Tel Aviv said.
Six had already been released and the rest were suffering from "anxiety", he said.
The bus was passing the military headquarters in the city at the time of the blast.
Police say they believe the blast was caused by a bomb and they are still searching for a suspect.
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After the bus explosion, huge blasts were heard in the Gaza Strip as the Israeli bombardment of the Palestinian territory continued.
Eleven people were killed in Gaza on Wednesday, the health ministry said.
Efforts are continuing to broker a truce between Israel and the Hamas movement which runs Gaza.
After eight days of exchanges of fire between Israel and Palestinian militants in Gaza, US Secretary of State Hillary Clinton is now in Cairo for talks with the Egyptian president.
Earlier, she and UN Secretary General Ban Ki-moon held talks in the West Bank with the Palestinian Authority President Mahmoud Abbas.
The US "strongly condemns" the bus bombing, Mrs Clinton said.
Meanwhile, militants in Gaza have been firing more rockets at Israel.
Hamas, the Islamist movement which has governed Gaza since 2007, has praised the attack but has not said it was behind the blast.
According to Israel's ministry of foreign affairs, the last
bomb attack in Tel Aviv was in April 2006, when a suicide bombing on a
restaurant killed 11. = BBC