HOPKINS, Minn. - Police say someone is using rat poison pills and antifreeze to poison dogs in Hopkins.

Hopkins Police Sgt. Michael Glassberg says, in the past month, one dog has died and two others have been poisoned in the 200 and 300 blocks of 9th and 10th Avenues North.

Someone is putting antifreeze in dog food and placing rat poison pills in the yards of people with dogs.

"We want to get the word out. This is certainly concerning," said Glassberg.

Residents in the Hopkins area are asked to call police if they see anything suspicious or have recently had a sick dog believed to have been poisoned. Hopkins Police are offering a $1,000 reward for information leading to the arrest and conviction of the people responsible.

To offer tips, call 952-938-8885 and ask to speak with Investigator Denny.