Egyptian security forces were on high alert Sunday after Cairo was engulfed in chaos overnight Saturday. There was rampant looting, and lawlessness spread fast. Residents of affluent neighborhoods were boarding up their homes against gangs of thugs roaming the streets with knives and sticks, and gunfire was heard in some neighborhoods.The death toll from five days of protests rose sharply since Friday to around 70 with over 2,000 people reportedly injured. British newspaper The Daily Telegraph reported Saturday that Egyptian President Hosni Mubarak has fled Cairo and was hiding in his Sharm e-Sheikh winter home.According to the report, workers in the resort said they saw Mubarak's entourage arrive on Wednesday, however no officials could confirm the report.Also on Sunday, a Gaza Palestinian border official said Egypt has closed its border with the Hamas-ruled territory amid the raging turmoil in Egypt. Ghazi Hamad said he expected the closure to last several days.The border terminal at Rafah had been rescheduled to open Sunday after a routine, two-day weekend closure. About 400 to 600 Palestinians cross through the terminal daily for medical treatment, study and family visits.Gaza reports also said three Palestinians who were imprisoned in Egypt had escaped during the upheaval and had returned to the coastal territory through smuggling tunnels. Hamas officials said group leaders have postponed a trip through Egypt to Syria, where they were to discuss a new proposal to free a long-held Israeli soldier.Melanie Lidman contributed to this report