A backpack full of ammo and a gun was discovered at a Guelph restaurant, leading to the arrest of two people.

Guelph police say it happened Thursday afternoon at a restaurant near Wellington Street W. and Imperial Road S. in the city's west end.

A man and woman left a black laptop bag in the restaurant, according to police.

After people who worked at the restaurant looked inside the bag, they called police.

Officers found a sawed-off shotgun and 22 shells.

Police say a 33-year-old man and a 34-year-old woman were later arrested. The woman was also carrying "two prohibited knives," police said.

The pair are facing numerous firearm and weapons-related charges.