Memphis, Tennessee (AP) – A casino south of Memphis was shut down for almost 12 hours because a storm knocked out electricity.

Harrah’s Casino in Tunica, Mississippi, is back in business after lightning blew out a transformer.

The Mississippi gaming commission told Harrah’s to shut down because some of the casino’s surveillance equipment was not working.

The casino closed from 9:30 Monday night until 8 Tuesday morning.

Several other casinos in Tunica lost electricity but Harrah’s was out the longest.

Harrah’s says it has no idea how much revenue was lost.