Chester Police are investigating after the charred remains of two dogs were found Saturday in Delaware County, NBC10 reported.

Investigators say the two dogs, which appeared to be mixed-breed pit bulls, were found on the 2000 block of West Sixth Street in Chester. Fire crews had been called to the scene around 8:30 p.m., when they found the carcasses on fire, according to 6ABC

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Authorities said the dogs had been tied up, placed in a bag and set on fire. They may have already been dead before being placed in the bag.

A cause of death has not yet been determined. Officials haven't released any information regarding suspects.

RELATED: Tortured dead puppy found abandoned in Willow Grove

An animal welfare group is offering a $1,000 reward for any information relating to the case of animal cruelty, the Morning Call reported. 

The Justice Rescue group said the reward would be used to pay for forensic tests needed for the case.