Violence erupts after Friday prayers in Egypt

Muslim Brotherhood supporters and riot police clash in Egyptian capital and other cities in defiance of crackdown.

The BBC's Quentin Sommerville in Cairo said there had been heavy gunfire and explosions in the city centre.

State TV reported further clashes in the northern Sharqiya district and to the east in Giza, as well as in the northern port city of Alexandria.

Hundreds have been killed since the military deposed Mr Morsi in July.

Thousands of members of the Muslim Brotherhood have also been detained in the past two months. Several senior figures, including Mr Morsi and the movement's general guide Mohammed Badie, are being held on charges such as incitement to violence and murder.

The authorities portray the crackdown as a struggle against "terrorism".

Clashes broke out in Cairo and several other Egyptian cities on Friday during protest marches staged by supporters of deposed President Mohamed Morsi of the Muslim Brotherhood, security sources and state media said.

In the capital, an Egyptian army vehicle fired live rounds in the direction of Muslim Brotherhood supporters, killing at least one protester, Reuters news agency reported quoting medical sources, but Egypt's health ministry said it could not confirm the fatality.

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Al Jazeera's correspondent in Cairo - who cannot be named due to security reasons - also said that automatic weapons were fired near the square.

"Tear gas is also being fired on one of the bridges in central Cairo to prevent them from getting to Tahrir Square. In Alexandria, too, police is firing tear gas to dissuade local residents from fighting with anti-coup protesters," Al Jazeera’s correspondent reported.