George Galloway, the British MP leading the Viva Palestina international aid convoy to the Gaza Strip has been forced to leave Egypt, the group has said on its website.
Galloway was apparently picked up by Egyptian officials at the Rafah border crossing on Friday and driven to Cairo where he was placed on a flight back to London.
Galloway told Al Jazeera by telephone from the airport that he had been harassed by about 25 Egyptian police officer as he attempted to re-enter Gaza to join the rest of the Viva Palestina activists.
He said Egyptian officials told him he was being sent out of the country and was now "persona non grata".
The Egyptian foreign ministry later issued a statement saying Galloway would not be allowed to return to the country.
Galloway has been vocal in his criticism of Egyptian authorities in recent days after their decision not to allow the about 200 vehicles in the convoy to arrive in Egypt through the port at Nuweiba.
Cairo insisted that the aid be sent back through Syria and then by ferry to the port of El-Arish on the Mediterranean.