(Portland, OR)  --  Police are searching for a man accused of robbing a Domino's Pizza at gunpoint.  The robbery happened last night at the restaurant at 453 Northeast 70th Avenue.  Police say the suspect showed a worker there a handgun and demanded money before fleeing on foot.  It's not yet clear if the robbery is connected to a similar armed robbery at a Papa John's Pizza on Rosa Park Way on Monday.  Police say the suspects in both robberies have similar descriptions.