A 49-year-old mother and her 22-year-old daughter have been stabbed to death in a street in Solihull.
West Midlands Police said they were treating the deaths of the pair, who were found in Northdown Road just after 00:30 BST, as murder.
Officers said a suspect – said to be known to the victims – had been identified and they were “making urgent attempts to arrest him”.
The force urged anyone with information about the murders to call 999.
‘Devastating and heart-breaking’
The area has been cordoned off while examinations are carried out.
Det Insp Caroline Corfield said: “What has happened this morning is truly devastating and heart-breaking.
“Our thoughts go out to the two victims’ family and friends at this traumatic time.”
She added: “We are still in the very early stages of our investigation but we believe the offender is known to the victims.
“We are appealing to him come forward as a matter of urgency.”
The force said officers were speaking to people living nearby and there would be a “visible presence” over coming days to “provide community reassurance”.