An inquiry has been launched after video appearing to show officers drag an incapacitated woman from the road and leaving her in a bus lane.
23 police officers and an MP were among those injured during a night of fierce violence in Northern Ireland.
For the first time in over a centenary the Union flag no longer flies over Belfast City Hall, sparking outrage in the loyalist community
The police stand-off with loyalist rioters in North Belfast is coming to an end in the early hours of Sunday morning.
Police forces moved in to disperse the situation and the area is now relatively calm.
Baton rounds and water cannon are being used in north Belfast as police continue to come under attack by loyalists.
The Police Service Northern Ireland has confirmed more unrest and disorder in North Belfast.
Police can confirm that a number of AEPs have been fired during ongoing disorder in the Woodvale area of North Belfast tonight.
A number of petrol bombs have been thrown at police lines in the Woodvale area of Belfast, striking one officer.
The Police Service Northern Ireland said the officer had been examined by medical personnel and remained on duty.
Officers have also responded to isolated incidents elsewhere in north Belfast, at Rosapenna Street and North Queen Street.
Police said the unrest continued to be sporadic in nature.
Police have created a no-go area between two parts of Woodvale Road in north Belfast.
Some local people have been "trapped" in-between.
Disorder has now moved to Woodvale Parade, off Woodvale Road in north Belfast and water cannon is being used.
Water cannon have moved in to clear the entry off Woodvale Avenue where police are being attacked by loyalists.
A small group of masked youths are involved involved in the disturbances.
Police are dealing with disorder in the Woodvale Rd area of North Belfast. A number of missiles have been thrown at police lines.
PSNI Chief Constable Matt Baggott today condemned those responsible for the trouble and also criticised those within the Orange Order leadership who called for protests.
Police in the Woodvale area of north Belfast have come under sporadic attack from loyalists, who had earlier attempted to march along a road.
Stones and bottles have been thrown.
Loyalist protesters are staging a peaceful protest at top of Twaddell Avenue in north Belfast, close to the Ardoyne area.