Froms the BBC "
Police are linking all three deaths.
A 31-year-old man has been arrested on suspicion of murder and remains in police custody.
Very little information has been publicly released about the suspect but the BBC understands he is a West African migrant with a history of mental health problems."
"
The 31-year-old suspect in custody is originally from West Africa but had been in the UK for many years, official sources have confirmed.
He is not a British citizen but he had settled status, meaning he had permission to stay in the country for several years.
He did not have a criminal record and was not known to the security services."