A suicide bomber has blown himself up in Tel Aviv, raising the spectre of further violence as Palestinians and Israelis prepare for elections. The attacker was the only victim of the blast, although 30 other people were reportedly injured. Witnesses say he posed as a street vendor and went up to a cafe near the old bus station before setting off the device. Islamic Jihad has claimed responsibility for the attack. The militant group, which is sworn to Israel’s destruction, says a 20-year-old Palestinian was the perpetrator.