TUCSON - A police chase ended with two men in custody Sunday night.

It started out as an armed robbery investigation.

Police say two men tried to rob the Toys R Us on Oracle near Roger.

Sergeant Chris Widmer says they fired one round into the air and then left in a car.

Tucson Police chased after them, along with a helicopter in the air.

The suspects drove down on I-19 and Ajo and rear-ended another vehicle.

They then bailed out of their car.

Police found them at a trailer park nearby and arrested them.

Investigators also recovered a gun.

Police think the suspects may also be connected to another armed robbery at a Denny's on Valencia Road earlier Sunday evening.