Many Palestinians have crossed into Egypt for a second straight day, to stock up on food, fuel and household supplies that have been scarce since Israel imposed a blockade on the Gaza Strip last week.
Egyptian border guards patrolled access roads to the region on Thursday, preventing Palestinians from moving beyond the border area markets.
The office of Israeli Prime Minister Ehud Olmert warned Israelis not to visit the Sinai Peninsula. He also said those who already are there should leave, out of concern that Gaza militants who crossed the border into Egypt could strike at Israeli tourists.
An Israeli spokesman, Arieh Mekel says Israel wants to sever ties with Gaza altogether, now that the Palestinians are getting supplies from Egypt. He says Israel expects Egypt to solve the problem. Egypt has rejected that idea.
Israel imposed the blockade in response to Palestinian rocket attacks into southern Israel.