"I strongly condemn the excessive use of force and the deaths, and I am working hard and in every direction to end the confrontation in a peaceful way, God protect Egypt and have mercy on the victims," he said on his Twitter account.
Dozens of Morsi's supporters were shot dead early today in the deadliest incident in a month as violence erupted after huge rallies for and against the Islamist president who was ousted in a military-led coup on July 3.