Biloxi Fire officials say Saturday's fire on Deer Island appears to have been set intentionally.
Fire Chief David Roberts says witnesses saw about four teenage boys running from the direction of the blaze.
He says firefighters were back on the island Sunday morning to make sure the fire was still contained.
Authorities say the fire started around 2:30 P.M.
Roberts said about 20-25 acres of land were destroyed, but no one was injured.