Indianapolis police think a serial robber may be responsible for two overnight robberies. A clerk at the Days Inn on Craig Street in Castleton was robbed at gunpoint early Tuesday morning. Then, a Village Pantry at 95th Street and Hague Road was robbed a few minutes later. Investigators say this is likely the same man that's been robbing businesses on the northeast side for several weeks. A man in a black truck followed the suspect, but stopped after the man started shooting at him. No one was hurt.