Drivers headed on I-75 Saturday night were in for a surprise as a road sign warned that the road was closed due to a gorilla on the loose!

Obviously the sign was hacked by someone pulling a prank on drivers, but MDOT is not laughing.

According to WNEM, MDOT is still trying to figure out what happened, who did it and how to prevent it from happening again.

I realize that this is serious, and very illegal but considering some of the terrible things people have put on these signs once they hack them, I'm not to upset over this.