Two men have been arrested in connection with the fatal shooting of Annie Besala Ekofo and her nephew, Bervil Kalikaka-Ekofo, in north London on Thursday.
Detectives investigating the deaths, which are feared to have been a case of mistaken identity, have arrested both men on suspicion of murder.
A spokesperson for the Metropolitan police said that a 20-year-old man was arrested in the early hours of Saturday and has subsequently been released on bail until late October.
A second man, aged 24, was arrested on Sunday and remains in custody at a north London police station.
Besala Ekofo, 53, described by her family as “always [being] a comfort even in the hardest situations” and Kalikaka-Ekofo, 21, a university student who “never looked for trouble”, were shot at a flat in East Finchley early on Thursday morning. Both were pronounced dead at the scene.
Four other people including a child were also at the property but were unharmed.
A postmortem examination of Kalikaka-Ekofo was done on Saturday and the cause of death has been confirmed as a gunshot wound to the head. Besala Ekofo’s postmortem has yet to take place.
Detectives appealed for information and said they are keeping an open mind as to the motive for the attack – as well as investigating whether anyone else associated with the address was the target.