Two people have been charged after NSW Police scooped up five people in Sydney’s west following reports of a gun being fired.

Officers went to Charles Street in Liverpool shortly after 2am on Monday and set up around a block of units.

A man, 43, was later charged with two counts of possessing a shortened firearm and a woman, 29, has been charged over the alleged theft of a truck along with drug and driving-related offences.

The pair were refused bail to appear before Liverpool Local Court on Tuesday.

Three remaining people who were arrested have been released pending further inquiries.

By Maureen Dettre in Sydney