Long queues are reported at polling stations across Egypt for a referendum on constitutional reforms.
The vote is the first practical result of the uprising which swept President Hosni Mubarak from power last month.
A BBC correspondent in Cairo says that for most Egyptians, this is the first genuinely free vote in their lives.
A large crowd attacked Nobel Peace Price winner and opposition figurehead Mohamed ElBaradei as he tried to cast his vote at a polling station in Cairo.
“We don’t want you, we don’t want you,” a crowd of youths chanted while hurling stones at his car, according to the Reuters news agency.
It is not clear if Mr ElBaradei was prevented from casting his vote.
