The Jefferson County Sheriff’s Office reports that a woman has died and her 36-year-old son was hospitalized after a dog attack on Black Widow Drive.

A 911 call about the emergency came in at about 7 p.m. Monday, according to the sheriff’s office.

The woman died on the scene. Her son’s injuries reportedly were not life threatening. The animals were owned by the victims; Jefferson County Animal Control has taken both animals into custody, the sheriff’s office reported.

The sheriff’s office has described both dogs as “terrier-pit bull” mixes, according to sheriff’s spokesperson Dionne Waugh.

As more details of the tragedy emerge, the dogs’ reported breed will be a center point of the discussion. Pit bulls are legal in Jefferson County but banned in Denver.

“We do not have any information about why this occurred,” Waugh wrote in an email.