BOSTON -- An 18-year-old was charged Tuesday in connection with a shooting that injured a 7-year-old boy in Roxbury.

NewsCenter 5's Gail Huff reported that Richard Penha, 18, of Hyde Park, was arrested Monday and charged with assault and battery with a dangerous weapon. He was being held on $75,000 bail.

VIDEO: Teen Charged In Shooting

The boy, Brandon Guerro, was playing with other children behind some townhouses at the Mission Main Housing Development on Smith Street on June 30 when he was caught in the crossfire. The boy was rushed to Boston Medical Center, where he remains in stable condition.

At the same time officers arrived at the shooting scene, an officer performing a paid detail was alerted by security at Brigham and Women's Hospital that there was a person shot located in the emergency room. Officers observed an 18-year-old black man suffering from a non-life threatening gunshot wound. This individual was identified as Richard Penha.

The preliminary investigation indicated that two males traveling in a Honda heading down Tremont Street toward Parker Street were approached and fired upon by someone on a bicycle. The driver was struck once in the torso and continued to drive. Shortly thereafter, the two individuals in the Honda saw the shooter on his bicycle in the Sewall Street area and it is believed that Penha returned fire. It was then that a stray bullet struck the 7-year-old boy.

Penha, suffering from a gunshot wound, was then driven to Brigham and Woman's Hospital. Further information that developed led detectives to arrest the second individual in the vehicle. Officers arrested Kenny Francois, 18, of Hyde Park and charged him with unlawful possession of a firearm. The firearm has not yet been recovered.

The investigation is ongoing and detectives are seeking any information that might lead them to the identity of the person who approached the vehicle on his bicycle.

Boston detectives are asking witnesses or individuals with information about this shooting to come forward. Please call the detectives from District B-2 at 617-343-4275. For individuals who wish to remain anonymous, you are urged to call either the CrimeStoppers Tip Line at 1-800-494-TIPS (8477) or text ‘TIP’ to CRIME (27463).