A 21-year-old man has been arrested on suspicion of the murder of a mother and daughter in Solihull.
Raneem Oudeh, 22, and Chloe Saleem, 49, were found stabbed to death outside their home in West Midlands town on Monday.
West Midlands Police said it arrested the man in the Sparkhill area of Birmingham at about 22:00 BST on Thursday.
Ms Oudeh’s ex-partner Janbaz Tarin, 21, had been named as a suspect in the investigation.
Computer equipment, mobile phones and a van were seized during raids at addresses in Birmingham and detectives said a suspected murder weapon had also been recovered.
Det Insp Caroline Corfield thanked the community for its support and said: “The response to our appeals has been excellent and tonight resulted in this arrest.”
A number of calls had been made by Ms Oudeh to the police on Sunday evening. During one of the calls, the situation “quickly escalated” and officers were sent out immediately, police said.