EDISON — A dog described as an "aggressive pit bull" fatally attacked a Jack Russell Terrier and remained on the loose Monday.

The unleashed dog without a collar attacked the smaller dog on College Drive as it was being walked in Millbrook Village near Middlesex Community College Friday around 11:45 p.m., according to Edison police.

The owner of the terrier, whose identity was not disclosed, told police the pit bull bit her 3-year-old until dog another resident hit the pit bull with a shovel, according to police. The pit bull ran off while the Jack Russell was taken to a veterinarian and later died for its severe injuries, polic esaid.

Edison Township’s animal control officers and police continued to search in the area of College Driver and Mill Road for a "large-breed dog" that fatally mauled a Jack Russell Terrier as its owner walked it along College Drive on Friday night.

Anyone seeing the dog should not approach it and instead call 911.

More from New Jersey 101.5:

Contact reporter Dan Alexander at Dan.Alexander@townsquaremedia.com or via Twitter @DanAlexanderNJ