Sabrina Moss had been celebrating birthday
A second man has been arrested over the shooting of a mother who was fatally wounded while out celebrating her 24th birthday in north London.
He was detained after nursery teacher Sabrina Moss, from Neasden, one of two women shot in Kilburn, died.
Scotland Yard believes the women were not the intended victims and were in the "wrong place at the wrong time".
Ms Moss, who had a four-year-old boy, died in hospital, where a second woman, also 24, is still being treated.
Met Police said the second man is being held at a north London police station while the first man arrested in connection with the investigation is also in custody.
Police and the London Ambulance Service were called at 04:12 BST on Saturday, to reports of the shooting in Kilburn High Road, where they found the injured women.
The second woman recovering in hospital is described as critical but stable.
Detectives from the force's Homicide and Major Crime Command are investigating the murder.
One card to Ms Moss left at a makeshift memorial in
Kilburn reads 'good friends are hard to find'
Det Ch Insp John Sandlin, of the Met, described the shooting as a "tragic incident".
"At this early stage, I believe the two women were innocent parties who were caught in the wrong place at the wrong time," he said.
Tributes have been paid to Ms Moss on social media sites, with one Adjei Adu writing "My heart goes out to her family and the lil one she's left behind, sleep well Sabrina Moss".
Another, Leila Hassan, tweeted: "My Thoughts Are With Your Family... A Beautiful Young Woman, Mother and Daughter!"
A post mortem examination is due to take place on Sunday.
Det Ch Insp Sandlin made an appeal for witnesses to contact police.
"In particular, I need to hear from anyone who saw two males who came into the High Road from Messina Avenue and, after the shooting, made off on foot back along Messina Avenue," he said.
An incident room has been set up at Hendon police station, which can be contacted on 0208 358 0300. Witnesses can also contact Crimestoppers.