Four petrol bombs were thrown during a disturbance in Londonderry during the early hours of Wednesday morning.
The petrol bombs were thrown at a police vehicle in Westland Street in the Bogside area, as they patrolled around 0030 BST.
Attempts were also made to move a vehicle. No one was injured.
Police dispersed a number of youths and calm was restored to the area, shortly after 0100 BST.
On Tuesday, a senior police officer in the city described the rioting in the Bogside on Monday night and Tuesday morning as amongst "the worst in a decade".
A masked gunman fired shots at police shortly after 0100 BST on Tuesday.
Petrol bombs were thrown at a police patrol car which was on fire when a gunman appeared and fired five shots at the vehicle from a handgun.
Chief Inspector Nick McCaw said he believed dissident republican were behind the attacks.
Police said they were treating the attacks as attempted murder.
No-one was injured and the gunman ran off.
A petrol bomb was also thrown at a passing van.