A young woman who was found stabbed to death in an alleyway in west London on Tuesday has been named by police as 21-year-old Ania Jedrkowiak.
Officers said on Wednesday they had arrested a man known to Ms Jedrkowiak on suspicion of her murder.
The 21-year-old Polish national was found with stab wounds in an alleyway off Church Gardens, South Ealing shortly after midnight.
Despite paramedics’ best efforts, her life could not be saved. Police said they were supporting her next of kin.
The “truly shocking” attack happened close to the Grange Primary School, forcing it to close on Tuesday.
A 29-year-old was arrested on suspicion of murder on Tuesday, and he has been taken into custody where he remains.
A 20-year-old man who was arrested on suspicion of murder has been released with no further action.
Ealing’s top officer, Chief Superintendent Sean Wilson, said the killing was a “tragic incident” that has “come as a shock to the local community”.
He said that police remain at the scene for searches and forensic examinations, while patrols would be carried out in the local area in coming days.
“We are grateful to those who live and work nearby for their support and understanding as we continue our work. We recognise the inconvenience it has caused,” he said.
“Where possible we have taken steps to allow businesses and other venues such as the local church to reopen as soon as our investigation allowed.
“I am particularly mindful of the proximity of this incident to a local school – something which meant the school had to remain closed on Tuesday.
“I know parents will be apprehensive and I’d like to reassure them that we are working with the school to make sure children can continue their learning with minimal disruption.
“We anticipate it will be able to reopen from Wednesday morning.”
Anyone with information is being asked to call 101 or by calling Crimestoppers, anonymously, on 0800 555 111. The reference for the incident is 77/17MAY.