Police in Longueuil warning women about the presence of a serial rapist in the area.

There have been four cases of sexual assault in the area since February, police said.

Women, particularly in the Brossard area should not walk alone, police said.

The victims have been women between the ages of 15 and 25.

The suspect was armed with a knife and carried out the attacks in the evening, said police.

The man has been descibed as a visible minority in his mid-twenties.

He said to be about five foot seven inches tall and weighs about 165 pounds.