At least three people have died after clashes between loyalists and opponents of ousted Egyptian president Mohamed Morsi, as tens of thousands of people have demonstrated in cities across Egypt. The three people were killed during clashes between rival demonstrators in the Nile Delta town of Mansoura. At least six others were injured in those clashes. The country's military, meanwhile, has warned that it may crack down violently on any future mass protests against the overthrow of the president that it carried out on July 3. Al Jazeera's Rawya Rageh reports from Cairo, the Egyptian capital.