Twenty-five petrol bombs were hurled during street disturbances in Northern Ireland by children as young as 14, police have said.
The disorder broke out at an interface area in Derry, when youngsters began throwing stones from the mainly nationalist Bishop Street into the loyalist Fountain estate, according to police.
CCTV footage shows a petrol bomb was also thrown into the estate, the last remaining mainly Protestant enclave in the city-side.
As police arrived on the scene, they are said to have come under attack from petrol bombs and other missiles.
Some of the youths involved are believed to be as young as 14. Many hid their faces with masks.
Police said the trouble began at around 7.30pm on Friday night and that around 40 young teenagers were involved.
Bins and rubbish are said to have been pulled onto nearby Lecky Road flyover and set alight during the unrest, blocking it off from traffic.
Investigators said the area was reported calm by midnight and that no injuries or arrests were reported.
A number of smaller disturbances occurred in the area during the week.