Detectives investigating a shooting at a shop in Stockwell, south London, that left a five-year-old girl with serious injuries have arrested a 14-year-old boy in connection with the incident.
A Metropolitan Police spokesman said the boy was arrested on suspicion of attempted murder, and was in custody.
Police also announced that the other suspect in the shootings,19-year-old Anthony McCalla of Streatham, south London, has been charged with the attempted murder of the girl, Thusha Kamaleswaran, and the other victim of the shooting, 35-year-old Roshan Selvakumar.
Mr McCalla was due to appear at Camberwell Green magistrates' court today to face the charges.
On Thursday a teenager apparently targeted by gangsters who accidentally shot Thusha came out of hiding to help detectives to find the attackers.
Relatives were at Thusha's bedside in hospital yesterday while detectives built up a "continuity trail" of the attackers' movements.
Police said the she remained in a "critical but stable" condition, while Mr Selvakumar's condition was described as stable.
Meanwhile, police officers were increasing their presence around Stockwell Food and Wine store, the scene of the shooting, as sources said up to 50 gangs are operating in the south London area.
Velluppillai Navaratnam, 49, a close friend of the Kamaleswaran family, from Croydon, south London, said it was a "very difficult time" for Thusha's relatives.
"The parents of Thusha areat the hospital now," he said. "We are all praying for her to get well soon."