Boston Police report arresting Shawn Antony Watt, 17, on charges of illegal possession of a loaded gun Tuesday afternoon.
Police say a lieutenant walking the area of River Street and Wood Avenue around 12:30 p.m. - as part of a stepped up presence following a shooting on Saturday - saw four men arguing.
One pair of suspects suddenly turned and ran toward Wood Avenue, the other two followed.
The lieutenant detective observed one of the males grabbing at his waistband and conducted a field stop. During a pat frisk, one of the males was found to have a loaded firearm on his person.