Two men treated in hospital following Saturday night’s disturbances in west Belfast are believed to have been hit by police baton rounds.
Police said their wounds “were consistent with being struck” by baton rounds.
One person remains in hospital where his condition is described as stable.
Police fired baton rounds after they came under attack from a large crowd throwing stones, fireworks, paint and petrol bombs at Broadway roundabout.
Several officers were hit with missiles, while one was hit with an iron bar. Nine police Land Rovers were also damaged.
The Police Ombudsman was informed about the use of baton rounds by the PSNI and is investigating the claims that two people were hit by them.
It is understood that one of those injured has been discharged from hospital while the other is in a stable condition in the Royal Victoria Hospital.
Meanwhile, Sinn Fein leader Gerry Adams has accused dissidents of trying to exploit tensions in west Belfast and encourage sectarianism.
The MP said career criminals were also involved in the trouble at the weekend and he said “a bit of sense” was needed.
“This is a very good neighbourhood and there is an ongoing contact to try and keep calm, particularly during times of heightened sectarian tensions like the twelfth,” he said.
“According to local people there were others purporting to be from so-called dissident groups who were clearly seeking to encourage the young people in particular.
“The people in this area are certain they want and end to this trouble and I echo this sentiment.”
On Sunday, police said the riots had been orchestrated.