Gaza ceasefire negotiations are due to resume in Cairo on Sunday, two Egyptian security sources said on Saturday, signalling continued efforts to secure a truce which U.S. President Joe Biden hopes will be in place by March 10. Biden said on Friday he hoped there would be a ceasefire deal between Israel and Palestinian group Hamas by the time of the Muslim fasting month of Ramadan, which starts on March 10. There was no immediate comment from Israel or Hamas, which have been negotiating via mediators including Egypt and Qatar. The sources said that an incident on Thursday in which more than 10…