Portland police have not yet made an arrest in the robbery of a KeyBank branch in North Deering on Friday, a police spokesman said Saturday evening. Police are searching for a man with a semi-automatic handgun who robbed the KeyBank branch on Auburn Street about 2 p.m. Friday. Lt. Robert Martin said police did not have any updates about the robbery to release to the public on Saturday. Police shut down parts of three streets Friday night in East Deering as they searched for the bank robber.