Petrol bombs were thrown as gangs of youths attacked each other in east Belfast last night.
Shortly before 10pm police responded to a report that two rival factions were fighting in the Castlereagh Street area of the city.
The youths fled as police arrived on the scene.
Not long after 10pm a petrol bomb was thrown from the Mountpottinger Road direction.
A second petrol bomb was thrown a short time later at a house on the same road.
Police recovered the remnants of a petrol bomb for forensic examination and also seized two petrol bombs.
Just over an hour later police received a report that youths had gathered at Woodstock Link and missiles were being thrown.
At the same time the windows of a property on the Albertbridge Road were smashed.
PSNI superintendent McEwan said: “Since April 15 2014, there have been 48 arrests at interfaces in East Belfast for criminal damage and other public order related offences.
"Police are committed to keeping communities safe and will allocate resources as required to do this.
"Parents are reminded to ensure that they know the whereabouts of their children as anyone that is caught engaging in disorder or criminal damage is likely to end up with a criminal record.”