At least 29 people were killed and 167 others injured Saturday during clashes between supporters of ousted Islamist president Mohamed Morsi and security forces across the country, the health ministry said in a statement.

"The victims were killed in the governorates of Cairo, Giza, Alexandria and Menia," ministry's media spokesman Ahmed Kamel was quoted as saying by Xinhua. He added that the injured were from the said governorates in addition to Fayoum, Ismailia, Assiut and Beni Sweif.

Two blasts targeting police premises hit Cairo and Suez governorate Saturday, killing a child and injuring nine people.

Amid tight security measures, thousands of Egyptians took to streets across the country Saturday to mark the third anniversary of the Jan 25 uprising that toppled president Hosni Mubarak in 2011.

The police fired tear gas shells and birdshots to disperse several pro-Morsi marches led by the Muslim Brotherhood, currently blacklisted by the interim government as a "terrorist group".

Earlier in the day, several Brotherhood supporters were injured and dozens others were arrested.

On Friday, a string of explosions rocked Cairo, killing six people and wounding about 100 others, while some 15 people were killed in clashes between security forces and pro-Morsi protesters nationwide.