Egyptian protesters frustrated with President Mohamed Morsi's government clashed with police Monday in Cairo during rallies marking the second anniversary of former leader Hosni Mubarak's resignation.
Police used water cannon and volleys of tear gas to disperse stone-throwing demonstrators outside the presidential palace, where several hundred protesters have gathered.
Several carried banners calling for a revolution, while others chanted for the end of the Muslim Brotherhood.
Protesters have also marched towards Tahrir Square. Earlier in the day, protesters briefly blocked trains in a central Cairo subway station.
Tahrir Square was the epicenter of the 18-day uprising that forced Mr. Mubarak to step down and end his nearly 30-year rule.
The revolution brought a new government, but protesters have rallied against Mr. Morsi's policies, saying he and his Muslim Brotherhood supporters are betraying the spirit of the 2011 uprising.
Protesters are calling for a new unity government, with the country's largely secularist opposition seeking seats in the Cabinet.
The president's allies have resisted that demand, saying the opposition is trying to gain power that it could not win through elections.