Egyptian soldiers in north Sinai prevented an aid convoy of activists from reaching the Rafah border crossing with the embattled Palestinian Gaza Strip on Saturday, an AFP correspondent said.
An army officer at the Balloza checkpoint, one of many along the desert highway to Rafah, told an AFP correspondent that the security situation in the restive peninsula was too unstable to allow the convoy of 11 buses and 500 activists to pass.
There was a brief scuffle between some activists and soldiers but no arrests were made.
Egypt usually keeps the crossing closed, citing a counter-insurgency operation against militants in north Sinai, but has allowed entry to Palestinians wounded in the 12-day conflict between Hamas and Israel.
At least 333 Palestinians have been killed since Israel launched its assault.