A prominent Egyptian dissident said an assailant on a motorcycle attacked him by igniting a flammable substance in his face, leaving him burned.
Ayman Nour said he was treated at a hospital for first-degree burns and is recovering at home.
Nour said the Friday night attack came a day after he pledged to supporters that he would run again for president in 2011 if his political party nominates him.
Nour spent four years in prison after challenging the country's longtime president, Hosni Mubarak, in a 2005 election. He was released in February.
Nour said on Saturday that he believes Mubarak's ruling party was behind the attack.