Winnipeg police arrested four suspects and seized methamphetamine worth $90,000 in a drug investigation.

Police carried out a traffic stop on Dec. 7 shortly before 6 p.m. in the area of Thames Avenue and Watt Street.

Officers arrested a 15-year-old boy, 39-year-old man and 30-year-old female.

Police then carried out a search of two residences in the 500 block of Chalmers Avenue and arrested a 21-year-old woman.

Inside the homes, police seized methamphetamine with an estimated street value of $90,000, along with $7,500 worth of marijuana, two sawed-off rifles, two assault rifles, a shotgun, several hundred rounds of ammunition, throwing knives and other weapons.

Police said the four people arrested face charges for multiple drug and weapons offences.

Investigators continue to look for a fifth suspect.