A mother and daughter are fighting for their lives after a stranger launched a hammer attack in the street.
Joe Xuereb, 27, was arrested after the women were targeted at Adderley Gardens in Greenwich, south-east London, on Sunday.
Officers were called at 12.10pm to find the women, aged 64 and 30, suffering from injuries “consistent with a violent assault”, Scotland Yard said.
They were taken to south London hospitals where they are in a critical condition.
A hammer was recovered from the scene which was “believed to have been used in the assault”, a police spokesman said.
The suspect, from Greenwich, is thought to have mental health issues, police said.
A man who called an ambulance after the two women were viciously attackedoutside his flat has described how neighbours rushed to their aid.
Bob Gover, 69, heard a scream outside his window on Adderley Gardens in Greenwich, south-east London, as a passer-by saw the mother and daughter with devastating injuries.
The retired TV engineer told the Press Association: "I heard a bit of a commotion, I looked outside and there was about half a dozen people out there.
"I went out there and I saw blood on the face of one of them and I knew something had happened so I ran inside and phoned for an ambulance.
"One of them was moving at the time and sitting in an upright position with somebody holding her up, while the other one was laying down.
"They were both covered in blood."
The younger woman's partner was at her side attempting to comfort her when the ambulance arrived, he said.