Police have attacked anti-government demonstrators in the Yemen, leaving up to six people dead according to witnesses.
The BBC reports hundreds of police moved in, using tear gas, water cannons and live bullets at a protest camp in Tahrir Square in the capital Sanaa.
The clashes came after the US urged opposition groups to take up President Ali Abdullah Saleh's call for talks.
Weeks of protest against his 32-year rule have left about 30 people dead.
The protesters have been camping out in Sanaa's Tahrir Square for weeks.
One doctor in the camp told the BBC that six people were dead and hundreds injured.