ST. PAUL, Minn. — Two men were hurt when a gas tank in a St. Paul scrap yard exploded.

The Minneapolis Star Tribune reported the men were cutting into the tank Saturday afternoon so it could recycled when it exploded.

Authorities said the explosion could be heard from blocks away. Debris traveled as far as a block and a half. It's unclear what type of gas was in the tank.

Both men were being treated at a local hospital. Their conditions were unknown.