A person who put a bag of kittens and a mother cat under the wheels of a vehicle is being sought by the Society for the Prevention of Cruelty to Animals in Prince Albert, Sask.

According to the SPCA, a bus driver who parks his personal vehicle across the street from the shelter felt a thud under his wheels last Thursday.

He got out to find that two matching backpacks had been placed under the front tires of his vehicle.

He opened one backpack to find five kittens — two of which had died.

The other backpack contained their mother, a Siamese.

The SPCA says the driver was in emotional distress after the incident. Now the agency is trying to figure out who did this.

Police bylaw enforcement officers are searching for witnesses, as well.

The three surviving kittens and the mother cat are being cared for by the SPCA.

They will eventually be put up for adoption.