The PSNI say an 18-year-old man has been released on conditional bail to return later.
Both had been arrested following Wednesday night's
disturbances in the Ardoyne area of North Belfast.
The PSNI says around 100 youths gathered and threw stones, bottles and petrol bombs at officers.
A car was also set on fire shortly after midnight and one policeman was injured.
Detectives investigating a shot fired at police during the rioting on Monday have released without charge a 30-year-old man who was arrested this morning.
A 28-year-old man, who was detained yesterday in connection with the same incident, has been released unconditionally.
Trouble in the area began after an attempt was made to disrupt an Orange parade.
Sinn Féin and the PSNI blamed dissident republicans for Monday's trouble but a number of republican groups later denied involvement.
Gerry Kelly, Sinn Féin MLA for North Belfast, repeated his claim that a number of dissident groups had come into the area on Monday afternoon deliberately to cause violence.
He also revealed he had been notified that a threat had been made against him. Mr Kelly said his party had received an unprecedented number of calls from local residents saying they did not support the trouble and they did not want a return to the violence of the past.
In a statement the PSNI said they were continuing to work closely with the community to end these disturbances.
The statement said no-one wanted this kind of disorder and violence in their neighbourhood, preventing members of the community from going about their normal routine and causing damage to homes and businesses in the area.
Police appealed to all of those with influence in the community to work with them to bring the disorder to an end and appealed for anyone with information to come forward.
Parish priest Fr Gary Donegan said the violence was no longer a reaction to Monday's controversial parade but it had become a form of recreation for young people.
He said he hoped the situation would now calm down.
