A gang of knife-wielding attackers stormed a barber's shop in east London before stabbing three men.
One of the victims, aged 25, remains in hospital after being knifed in the chest and abdomen, although his injuries are not thought to be life-threatening.
An 18-year-old was also cut in his arm during the incident in Forest Gate, while a 20-year-old was stabbed in his abdomen and hand.
Detectives in Newham have launched an investigation after the group entered the barbers on Katherine Road at 6.20pm on March 28.
No arrests have been made yet as enquiries into the stabbings continue.
A Met Police spokesman said: “Detectives in Newham are appealing after three men were attacked and stabbed.
“The incident happened at about 6.20pm on Tuesday, 28 March at a barbers in Katherine Road.
“The victims were in the barbers when a group of men, who were armed with knives, ran in and attacked them.”
Anyone with information is asked to call police on 101 or you can contact police via Twitter @MetCC
To give information anonymously contact Crimestoppers on 0800 555 111 or via the crimestoppers-uk.org.