Thousands of stolen respirator masks are on their way to hospital supplies after they have been recovered in the U.S. state of Oregon amid coronavirus outbreak, according to Portland Police Bureau.

The bureau said in a statement on Sunday that the masks were recovered after they were discovered for sale on Craigslist online market.

“On Friday, March 6, 2020, a North Precinct officer responded to The Rebuilding Center at 3625 North Mississippi Avenue on a theft report involving 20-25 cases of N95 respirator masks,” it said.

The N95 masks are used by health personnel during the treatment process of

Read more: US police recovers donated respirator masks after theft