A teenage girl was being questioned by police today after a 45-year-old man was stabbed to death.
Officers were called to Ferndale Road, Stockwell, south London, at around 6pm on Friday to reports of a serious assault.
A 45-year-old man, who was not formally identified, was pronounced dead at the scene. He had been stabbed in the chest.
A police spokesman said the girl was in custody at a south London police station.
An 18-year-old man was arrested earlier and was bailed to return in May.
Information should be passed on to the incident room on 020 8721 4054 or anonymously to Crimestoppers on 0800 555 111.