Bomb threat called in to Royal Oak Yogurt City (UPDATE)

ROYAL OAK, Mich. (WJBK) - WEB UPDATE: Royal Oak police have cleared the scene of a bomb threat on Main Street Tuesday afternoon.
Taryn Asher reports that business owners said police have investigated and are calling it a prank. Yogurt City and two other nearby businesses had been evacuated.
The businesses, including Yogurt City which received two bomb threats earlier, were reopened around 5 p.m.
Original story is below
Royal Oak police are at the scene of a bomb threat at a yogurt shop.
Yogurt City, 122 S. Main Street, received two bomb threats Tuesday afternoon. A bomb sniffing dog unit was called to the scene, while officers are stationed outside the business keeping a perimeter.
According to sources, the second call claimed that a bomb would go off in four hours. It is unclear if the calls were made by the same suspect.
The store is located near Eleven Mile Road.