Israeli air strikes have targeted the headquarters of Gaza's Hamas leaders, as the bombardment of the coastal enclave moved into a fourth day. Witnesses reported extensive damage to the building, which Egypt's PM Hisham Qandil had visited yesterday. At least 29 Palestinians and three Israelis have died since Israel killed Hamas's military chief on Wednesday.

Israel earlier put 75,000 reservists on stand-by amid speculation of a ground invasion. After a lull overnight, Gaza City was hit by a series of large explosions just before dawn today. Militants in Gaza continued to fire rockets into Israel, aiming at Tel Aviv and Jerusalem yesterday.