Cairo, Aug 14 (IANS): At least one person was killed in Egypt Thursday in clashes between security forces and supporters of ousted Islamist president Mohamed Morsi, media reported.

Morsi's loyalists are staging anti-government protests nationwide Thursday to mark the first anniversary of the dispersal by security forces of two major pro-Morsi sit-ins in Rabaa al-Adawiya Square in Cairo and Nahda Square in Giza, which left at least 1,000 dead and thousands under arrest.

The protestor's death occurred in Giza's Agouza neighbourhood, Xinhua reported citing state-run Al-Ahram news website.

The police arrested dozens of protestors affiliated to the deposed president and his Muslim Brotherhood group in several provinces across Egypt, including capital Cairo, nearby Giza, Qena, Sharqiya and Alexandria.

New York-based Human Rights Watch organization described in a recent report the disbanding of the two pro-Morsi sit-ins last year as "crimes against humanity" and called for the trial of those responsible for it.

The controversial report has been condemned by the Egyptian authorities as "biased and negative".

The April 6 Youth Movement, which supported Morsi's overthrow and opposed the Brotherhood, has recently described last year's dispersal of pro-Morsi sit-ins as "a massacre whose perpetrators will be tried sooner or later".

Since Morsi's removal by the military in July last year, extremist groups have killed hundreds of people through terrorist attacks against police and military personnel and premises, which eventually led the new leadership to brand the Brotherhood as "a terrorist organisation" although other groups claimed responsibility for the attacks.

Morsi's loyalists have been holding constant anti-government protests, denouncing his removal as "a military coup".

Ex-military chief Abdel-Fattah al-Sisi, who led Morsi's ouster following mass protests against the deposed Islamist president, was elected Egypt's new president in June.