Southern Oregon Humane Society discovered the bodies of seven Labrador or German Shepherd mix puppies inside a sealed containeron Sunday.

MEDFORD — Seven puppies apparently suffocated in plastic bags and sealed in a plastic storage container were discovered near the trash bins of the Southern Oregon Humane Society.

The puppies appeared to be Labrador or German shepherd mixes about 8 weeks old. Their bodies were found Sunday.

Bill Templeman, executive director of the humane society, said the shelter is investigating the incident with Jackson County animal control officials.

He couldn’t recall any other cases of animals that had been killed and dumped on the premises.

Templeman said the deaths were especially disheartening as the society was finding new homes over the weekend for a busload of small dogs, mostly Chihuahuas and Chihuahua mixes, rescued from shelters in Fresno, Calif.