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 Service of Northern Ireland has closed a number of roads in Belfast after bombs were thrown at officers in a fourth night of protests.
Due to large protest of several hundred people Twaddell Ave Nth Bt is currently blocked to traffic. Motorists advised to take avoid area
Police are currently dealing with public disorder in the Lower Newtownards Road area of East Belfast this evening.... http://t.co/iDM8DM3B0u
Crumlin Rd in North Belfast has been closed between Tennent St and Twaddell Ave. Motorists are advised to avoid the area.
An improvised explosive device was hurled from the nationalist Brompton Park area of Ardoyne and exploded after striking an armoured police vehicle just after 5pm.
There were no reports of any injuries.
Witness Sam Coulter, who was yards from the explosion at a loyalist protest, said it was fortunate no one was hurt.
– Witness Sam Coulter
We were standing having a peaceful protest when all of a sudden there was a bang and the next thing we heard the 'tinkle, tinkle, tinkle' of nails dropping on the ground.
I think it was directed at the protest - police were at the other side of the road behind a Land Rover. Luckily nobody was hurt - just a bit of a bang to the ears.The place is in lockdown now with police doing sweeps of the area to gather evidence.
This won't put us off our protest - we are still here.
Four improvised 'blast bombs' and a pipe bomb packed with nails have been thrown towards police lines in north Belfast.
– Police Service of Northern Ireland spokeswoman
Police are currently dealing with public disorder in the Lower Newtownards Road area of east Belfast this evening.
At least four blast bombs and several petrol bombs have been thrown at police. There are no reports of any injuries at this stage. Water cannon has been deployed and one AEP (attenuated energy projectile) round has been fired by police.
Police would appeal for calm in the area and would call on those with influence to do what they can to help restore calm."
Violence has erupted in east Belfast with at least four improvised explosive devices thrown at police.
Several petrol bombs were also hurled after disturbances broke out but there were no reports of any injuries, the Police Service of Northern Ireland said.
At least one plastic bullet was fired and water cannons have been deployed to quell the disorder.
It is the fourth consecutive night of trouble in parts of Belfast.
Police have warned that more people are expected to be arrested once video footage is analysed, as riots continued in Belfast for a third successive night.
At least six petrol bombs and other missiles were thrown at police on Sunday night.
Cars along with industrial bins were also set alight in north Belfast as clashes continued.
The Police of Northern Ireland said one officer had been injured in the riots, which stem from a decision to ban a Orange Order parade passing through the nearby republican Ardoyne area.
A special sitting of Belfast Magistrates' Court was held yesterday with plans in place to keep courts open if clashes continue.
Loyalist protesters have attacked police for a third successive night in Belfast.
Trouble again flared in the Woodvale Road area in the north of the city as the fall out from a decision to ban a controversial Orange Order parade passing through the nearby republican Ardoyne area continued.
Hundreds of loyalists were involved in a tense stand off with riot police throughout the evening, with disorder finally breaking out around 10.30pm.
Petrol bombs and a range of other missiles were thrown at police, who responded by firing baton rounds.
The Police Service of Northern Ireland (PSNI) said one officer had been injured in the initial clashes.
There is a peaceful loyalist protest ongoing in north Belfast. On the other side of Ardoyne roundabout, a group of nationalists are watching on.
Ligoniel Orange Lodges said they were suspending protest. Yet Orangemen, and their banner, are at the top of Twadell Avenue.
Police are blocking the top of Twadell Avenue in north Belfast, following a white line protest.
A crowd of several hundred is refusing to move.
North Belfast MP Nigel Dodds is making a good recovery after being knocked out during the loyalist riots that hit his constituency in recent days, the Democratic Unionist Party said tonight.
The DUP deputy leader, 54, was struck by a missile thrown by a rioter and knocked unconscious for around 10 minutes as trouble flared in the Woodvale Road area on Friday.
As he lay prone on the Woodvale Road, Dodds was drenched by a police water cannon that was being deployed to subdue rioters.
The MP spent Friday night in hospital and was discharged early on Saturday.
"Nigel is glad to be back home and he's making a good recovery," said the DUP spokesman."He hopes to be back in his office within the next few days."