Four men are being questioned over a brawl in Sydney's inner west in which the offenders allegedly used poles, bottles and fluorescent light tubes to attack each other, police say.

The fight occurred outside the Caltex Service Station on Enmore Road in Newtown just after 8pm on Thursday.

A NSW Police spokeswoman said police and paramedics were called to the service station to reports that a group of people were fighting, and several had been injured.

Officers from the Newtown Local Area Command arrived to find two men, aged 36 and 37, suffering minor injuries. The men are believed to have suffered stab wounds.

Paramedics treated the men before taking them to Royal Prince Alfred Hospital.