A man turned himself in Thursday morning after intentionally setting a fire in a storage shed on Madison’s east side, according to a release. Firefighters were called around 8:15 a.m. to the former Sentry Foods store in the 4600 block of Cottage Grove Road when witnesses noticed smoke coming from an old salt storage shed, officials said. Crews extinguished the fire and found evidence suggesting the fire was intentionally set, according to the release. As crews investigated the fire, a man turned himself in to the Madison Police Department East District precinct, admitting to starting the fire, officials said.