RCMP confirm three suspects are in custody and one is at large after a possible firearm incident at a home in Green Lake, Sask. on Saturday.

The incident began Saturday morning when RCMP responded to an call at a Green Lake residence that may have involved guns.

RCMP closed parts of Highway 55 through Green Lake. Police cautioned the public to stay indoors and to avoid the 100 block of Mill Street.

Around 2:30 p.m. Saturday, RCMP re-opened Highway 55, taking three suspects into custody.

One undescribed suspect remains at large. 

The investigation is ongoing.

Anyone who notices suspicious activity is asked to call Green Lake RCMP at 306-832-4810.