STOCKTON, Utah (AP) -- Workers at the Deseret Chemical Depot sealed some leaking mustard agent Wednesday.

The vapor from a leaking artillery projectile was detected during monitoring operations in a storage igloo.

Depot workers in protective clothing put the munition in a larger airtight container for continued storage, according to a statement from the Desert Chemical Depot.

The igloo is covered by earth and the air inside is filtered. No vapor escaped and there was no danger to the surround community, the release said.

The depot is about 40 miles west of Salt Lake City.