Armed Robbery Suspect Arrested Near Common

Two Good Samaritans reportedly helped police apprehend an armed robbery suspect after an incident near Boston Common at 75 Boylston St. Wednesday evening.

Police reported on BPDNews.com that two officers on patrol were alerted to an alleged robbery by a victim at about 7:40 p.m. Wednesday. A male and female victim were chasing the suspect across the park when a Good Samaritan tackled the suspect, allowing police to make an arrest.

With the help of two Good Samaritans and the victims, officers determined the suspect had stolen the female victim's cell phone. While distracted, police said a second suspect stole her laptop from under her backpack.

During a brief ensuing struggle, police said one suspect pulled a knife on the victims, made threats and then fled on foot. A folding knife, a lighter and a watch were found under the suspect, police said. They could not find the second suspect after a search.

The arrested suspect, a 17-year-old Dorchester resident, was charged with armed robbery and assault by means of a dangerous weapon.