Five men were injured after a stabbing attack in Bexleyheath, while two teenagers were taken to hospital with stab wounds following an apparent altercation at an east London tube station.
Police were called to reports of a stabbing in The Broadway, Bexleyheath around 9.30pm on Saturday.
One of the five injured men remains in a critical condition. The remaining four do not have life threatening injuries, according to the Metropolitan Police.
Five men were arrested on suspicion of causing grievous bodily harm. They remain in police custody.
Earlier in the evening two teenagers were taken to hospital with stab wounds following an apparent altercation at West Ham station just before 7pm.
One male was found on the platform of the station while a second teenager was discovered soon afterwards at the Abbey Road DLR station, location around half a mile away.
Both teenagers, aged 17, were treated by paramedics at the scene before being taken to hospital. They remain in a stable condition.
Officers from the British Transport Police will be at West Ham and Abbey Road station's on Sunday. They will be speaking to passengers and asking whether they saw or know anything of last night's incident.
Anyone who witnessed the incident or with information should contact BTP by texting 61016, or by calling 0800 40 50 40 - quoting reference 420 of 5/09/2020. Or call Crimestoppers anonymously on 0800 555 111.