Suffolk police arrested a Medford teenager early Thursday morning for allegedly committing two armed in the past two days after he was caught in the act.

Elliott Brown

Nineteen-year-old Elliott Brown entered the 7-Eleven on Route 25 in Selden, displayed a handgun and demanded money and lottery tickets from the clerk at 3:45 a.m., police said.

A Sixth Precinct officer witnessed Brown robbing the clerk and apprehended the suspect 45 minutes later with the help of Kojak, a police dog.

Sixth Squad detectives charged Brown with two counts of robbery after he was also alleged to have committed an armed robbery at 50% Off Cards on Route 112 in Medford on Wednesday.

Brown will be arraigned at First District Court in Central Islip on Friday.