NSW homes raided after Cross bikie brawl

The brawl in Sydney's infamous nightclub district happened about 12.15am (AEST) on Wednesday and allegedly involved about 50 bikies.

As part of police investigations into the February 5 incident, officers from the gangs squad simultaneously raided six houses at 7am.

They included alleged bikie houses at Wentworthville, Emu Plains, Macquarie Fields, Ryde, Smithfield and Sydney's CBD.

At Wentworthville, police allegedly seized ammunition, fireworks, equipment and chemicals used to make drugs.

A man aged 34 will be issued with a court attendance notice for possessing ammunition and an infringement notice for handling explosives.

In the raid at Emu Plains, police allegedly netted a loaded pistol and ammunition as well as tablets believed to be drugs.

A 43-year-old man has been released pending further inquiries.

At Macquarie Fields, police seized a quantity of steroids and other items, and a 26-year-old woman will be issued a court attendance notice for possession of an anabolic steroid.

Court attendance notices will be issued to a 23-year-old man after the raid at Ryde, where steroids and other items were seized.

At Smithfield, police seized a laser pointer and a small amount of amphetamine.

In Sydney's CBD, police located a tablets believed to be ecstasy, drug paraphernalia and other items.