Egyptians thronged to polling stations across the country for a second day Wednesday to vote on a new constitution as an official warned against vote tampering. "Anyone who contemplates meddling with the referendum ballot boxes once they are closed will be shot with live ammunition," Interior Minister Mohamed Ibrahim said late Tuesday after the first day of voting left at least nine people dead. The two day vote is being conducted amid political tensions and violence and Egyptian security sources told Ahram Online the army and police are securing polling stations across the country to prevent further unrest. A bomb exploded early Tuesday in a Giza neighborhood. No injuries were reported. Later in the day at least nine people were killed in clashes in Sohag, Giza and the Beni Suef governorate between supporters of ousted president Mohamed Morsi and security forces and more than 200 were arrested, Ahram Online said. Results of the voting are expected Thursday.