A teenager was shot and another stabbed after a gunman opened fire in a cake shop in east London.
Both teens were rushed to hospital but their injuries are not thought to be life-threatening.
Residents reported helicopters circling overhead last night as emergency services rushed to the scene.
No arrests have yet been made.
London Metropolitan Police said: "An investigation has been launched after a teenager was shot in Hackney.
"At 10.53pm on Friday, 23 April, officers were called to premises in Kingsland Road, E8 following reports of a male having been shot.
"A 19-year-old man was found suffering gunshot injuries and a second 19-year-old man was found with stab injuries.
"Both were taken to hospital by ambulance. Neither is in a life-threatening condition.
The Met added that a crime scene remains in place in Hackney and police have been granted additional search powers in the borough on Saturday.
A 14-year-old boy was also knifed to death outside a pizza shop on Friday.
Emergency services were called to Barking Road in East Ham, Newham, shortly before 4pm on Friday to reports of a stabbing at a Zzetta restaurant.
Despite the efforts of paramedics from the London Ambulance Service and London Air Ambulance, the victim was pronounced dead shortly after 4.30pm.
The Metropolitan Police said efforts were under way to inform the victim's next of kin.
The 14-year-old is the youngest teenager to be knifed to death in the capital this year.