UPDATE @ 11:40 p.m.: Two men, one of whom showed a knife, attempted to rob a Dairy Queen but got no money and ran, Miamisburg police said.
A K-9 unit was called in but lost the scent.
There were no injuries from the robbery, police said.
EARLIER: An armed robbery has been reported at the Dairy Queen on Main Street and police are en route.
Police were dispatched to the business, 326 S. Main St., at about 10:20 p.m.
We have a crew en route and we'll bring you the latest details as we get them.