POLICE have appealed for help to identify four teenagers as they investigate a break-in and graffiti at Hillsong Church.

Surveillance cameras captured four males passing the Bella Vista church between 10pm and 11.30pm on Saturday, January 9, police said.

Police from the Hills local area command were called to the church after the alarm was activated and found graffiti on the interior and exterior walls of the building, with damage estimated at $1000.

The four males were of white/European appearance, of thin build and between 13 and 16 years old.

The first had short brown hair and wore a white singlet with a blue/purple print, blue denim shorts, black backpack and a gold neck-chain.

The second male had thick, long brown hair and wore a lime green T-shirt with a black print on it, blue skinny denim jeans and black shoes.

The third had long, scruffy blond hair and wore a black and white baseball cap, black Nike T-shirt, white shorts and red boxer shorts.

The fourth had thick black hair and wore a white singlet with a black print on it and black shorts with a thick white stripe down the side.

Anyone with information about the break-in or the identity and whereabouts of the four teenagers is urged to contact Castle Hill Police on 96805399 or Crime Stoppers on 1800333000.