A young woman has been stabbed in a broad daylight attack in north London, police said.
Scotland Yard said the woman, aged in her 20s, was rushed to hospital after she was attacked in Caledonian Road, Islington, on Saturday morning.
Police and paramedics raced to the scene at 10.20am and emergency services vehicles were pictured lining the street.
An air ambulance was also scrambled to the scene.
A witness said he heard a young woman screaming during the stabbing and two men with a blade.
"Two of them attacked one and basically they got stabbed pretty badly," he added.
"I thought the woman was just screaming I didn't realise she was hurt."
Piles of clothes could be seen lying on the ground outside a parade of shops and cafes.
There was a trail of what appeared to be blood splatters along the pavement.
A man, who has not been identified, has been arrested and is being held by Metropolitan Police officers on suspicion of attempted murder.
The woman's injuries are not thought to be life-threatening, police said.
A&E doctor Matthew Swann tweeted: "Major police incident on Caledonian Road N1. Potential stabbing street.
"Two ambulance and police in attendance. Road closure in area. Incident control established. Cordon."
The perpetrator or perpetrators are currently at large.
A Met Police spokesman said no arrests have been made.
Buses and cars were being diverted away from the scene.
A London Ambulance Service spokesman said: "We were called at 10.16am, there were a number of calls to us reporting a stabbing incident.
"We sent a number of vehicles and our first ambulance arrived on the scene at 10.24am."
Witnesses are urged to call 101 and quote the reference CAD2686/sep01.