An Anchorage dog-rescue volunteer says someone posted on social media about a dog found loose in town Wednesday afternoon -- but the dog ended up tied to an office door Thursday morning.

Beth Deptula Prigge, with Alaska Bully Rescue, said the non-neutered adult male pit bull was first reported running loose at about 4 p.m. Wednesday, by a woman posting on a Facebook group for missing pets in Anchorage and the Mat-Su.

Another woman posted at about 5:30 a.m. Thursday that she had found the dog when she arrived for work at an office on East Tudor Road. That woman picked up the pit bull and contacted Prigge, who has contacted Anchorage Animal Care and Control. The dog was taken Thursday to the Hound Lounge in Midtown, from which Alaska Bully Rescue operates.

Animal Care and Control spokeswoman Laura Atwood said Friday that staff received Prigge's report but aren't handling the dog.

"Since Beth chose to keep the dog we are not involved with this animal at all other than entering the found report in our database," Atwood wrote in an email.

Prigge said the pit bull has been affectionate ever since it was picked up.

“Apparently the girl that had him before had him around his kids; he was friendly,” Prigge said. “He has his nails trimmed and he looks to be in good condition – he hasn't missed a meal.”

No details have come in about possible owners of the dog, Prigge said, which didn't have a collar or a microchip. What happened overnight remains “a total mystery.”

“I don't know why you'd take the time to post it and just let it go,” Prigge said. “Who knows what happened between 4 o’clock yesterday and 5:30 this morning?”

Pit bulls are commonly abandoned in Anchorage, Prigge said, with some people even leaving female dogs on roadsides after using them to breed and sell a few litters of pups.

“People are cruel,” Prigge said. “It doesn't even faze me – which is bad, because it happens every day.”

Found animals can be reported at 343-8122 to Animal Care and Control, which has posted tips about what to do if you find a loose dog. Alaska Bully Rescue can be reached at 907-242-3816.

Editor's note: An initial version of this story incorrectly said the dog had been found Wednesday tied to the office door, not loose.

Copyright 2018 KTVA. All rights reserved.