A mother was stabbed three times in front of her child in an unprovoked attack in south London.
The victim, 36, was pushing her child in a buggy when a man attacked her from behind in Downton Avenue, Streatham Hill, on Monday.
The knifeman did not speak to the victim before he stabbed her at about 17:20 GMT then ran off.
Police said the woman’s injuries were not believed to be life-threatening. The child was not hurt.
Neighbours told the BBC they heard the woman screaming and came out to help.
A man first on the scene said the victim told him: “I’ve been mugged.”
Two people said the wounds looked as if they were to the victim’s face or head area.
It is understood the woman was on the phone to her husband at the time and that he arrived soon afterwards.
No-one has been arrested. The Met said the suspect was a black man, about 6ft tall and wearing dark clothing.
Officers have been examining CCTV footage and are appealing for witnesses.
Two teenagers have been charged with murdering another boy who was stabbed in central London.
The two 16-year-olds have been charged with attacking Josiph Beker, 17.
The Met Police said officers were called to Edgware Road, near to the junction of Church Street, at 13:54 BST on Tuesday.
There officers found Josiph, who was also known as Yousef, had been stabbed in the chest. He was taken to hospital but died at about 19:30 BST.
The 16-year-olds will appear before Highbury Corner Magistrates Court.
An 18-year-old was also arrested in connection with Josif’s murder but he has been bailed pending further inquiries.
Three people have been arrested on suspicion of attempted murder after a 15-year-old boy was stabbed.
The victim remains in a critical condition in hospital following the attack in Tottenham, north London, on Friday.
He was found with multiple stab wounds on Willan Road, in the Broadwater Farm estate, at around 11:15 BST.
Scotland Yard said three males were detained in connection with the incident on Friday evening.
Officers believe the boy was involved in an altercation shortly before he was stabbed, possibly by a suspect riding a bicycle.
Police would like to speak to members of the public who gave first aid to the victim at the scene.
Det Insp Paul Ridley said: “I am keen to hear from anyone who either witnessed, or has information concerning this attack.
“The victim, not yet 16 years old, sustained multiple stab wounds and is fighting for his life.
“If you know anything about the circumstances surrounding the incident or if you witnessed it, please do come forward.
“I would also appeal to the members of the public who valiantly administered crucial first aid to the victim to come forward to my investigation team.”
Anyone with information is asked to contact police on 101.
A man has been stabbed to death in north-west London.
Police officers and the London Ambulance Service were called to Munster Square in Camden at about 23:10 BST on Monday.
The victim – whose age has not yet been released – was pronounced dead at the scene.
A murder investigation has been launched and a crime scene remains in place at Munster Square, Scotland Yard said.
No arrests have been made and any witness or anyone with information has been asked to contact the force.