By Nidal al-Mughrabi and Ori Lewis GAZA/JERUSALEM (Reuters) - Israeli fire killed at least 21 Palestinians in the Gaza Strip early on Wednesday as the Jewish state said it targeted Islamist militants at dozens of sites across the coastal enclave, while Egyptian mediators prepared a revised ceasefire proposal. Israel's Channel Two TV said progress was being made to achieve a deal in Cairo, where a Palestinian delegation was expected to arrive for discussions. Israeli tank shells pounding houses in eastern Jebalya in the northern Gaza Strip killed 13 people and wounded many others, health ministry spokesman Ashraf Al-Qidra said. Eight people, including five members of the same family in Jebalya, were killed in other strikes across the Gaza Strip.
Fresh Israeli bombardments rocked Gaza in the early hours of Wednesday, killing two children, as Palestinian factions were to head to Cairo to discuss a temporary humanitarian ceasefire. As the conflict between Israel and Hamas entered its 23rd day, international efforts to bring an end to the bloodshed that has killed more than 1,200 people continued apace, and concern grew over the high civilian death toll, especially among children. Since the war began on July 8, when Israel launched a campaign to stop rocket fire from Gaza and destroy attack tunnels, a series of concerted international efforts to bring a truce have fallen flat.