Egypt is urging activists to cancel a rally aimed at crossing from Egypt into the Gaza Strip to show support for the Palestinians.
In a statement Thursday, authorities called on activists to give priority to internal issues and "to prevent any repercussions that might result from this march."
The 1979 Egypt-Israel peace treaty and Egyptian sales of natural gas to Israel have come under criticism since the overthrow of President Hosni Mubarak's regime in February, but Egypt's military rulers are concentrating on local issues.
A Facebook campaign called for rallies Friday and a march toward the border on Sunday, called the "Sunday of Liberation."
Egypt's powerful Muslim Brotherhood has come out in support of a rally in central Cairo on Friday but does not favor the march on Gaza.