Suspicious cars and an attempted break-in a few weeks ago have left members on alert despite measures to combat anti-social behaviour.

The centre also had an intruder two days ago but there was no damage.

After the April attack committee members took turns camping out at the centre in sleeping bags before surveillance cameras were installed a few months ago.

President Azra Khan said three people tried to break into the centre about three weeks ago but fled when they noticed the CCTV cameras.

She said the footage revealed the group were "fairly well prepared do more damage". The incident had been reported to police.

"That's why every day we are still are concerned; everyday it's bracing yourself that hopefully nothing happens," she said.

"Although we have got all these measures in place we are not totally at ease. It doesn't necessarily mean a break-in; someone could jump the fence and vandalise the centre without being caught."

Expletives were sprayed on the walls, a library full of hundreds of books left trashed and kerosene was poured on the ground when vandals struck in April.

Since then staff have been more vigilant and police assisting with concerns.

A sleepover roster was used immediately after the April attack to protect the centre.

"We certainly couldn't afford a full-time security guard," Ms Khan said.

"I think the broader view is there's still a sense of, 'OK, can put all measures in place, someone wants to come in and create havoc they still can'."

Despite continuing issues, Ms Khan said the centre had received community support, including at the centre's open day a week ago.