Detectives have released CCTV footage as they investigate a “violent” home invasion in Sydney’s west earlier this year.

Police were called to the home on Fremont Avenue in Ermington at 12.30am on February 24 after four people, unknown to the residents, broke into the home and assaulted two men inside, aged 17 and 48.

The group also allegedly took multiple devices from inside the home before fleeing the scene.

The occupants of the home were taken to hospital for further treatment.

Police have today released CCTV of the attack, which they described as “violent”.

The men are first spotted on CCTV at about 9.25pm on February 23, getting out of a black van on Dudley Road in Guildford.

Police believe the same group of men were captured on CCTV arriving in Ermington at 11.30pm that night.

They step out of an allegedly stolen Mazda CX5 and walk towards the Fremont Avenue home.

Anyone with information is urged to contact police.