A man murdered his wife before killing himself at their home with their three children inside, police say.
The woman, 26, was "violently attacked" before she was killed at the house in Oldbury, West Midlands, police said.
The pair's bodies were found by police after a neighbour raised the alarm when they heard the children crying at about 14:00 BST on Saturday.
No-one else is being sought over the deaths. Detectives believe they died earlier on in the morning.
The three children are being cared for by family members after the bodies were found at the home in Pel Crescent.
Neighbours said the alarm was raised after the couple's eldest child knocked on the door of the house next door.
Det Insp Jim Munro said: "This is a truly tragic incident.
"It's understood the woman was violently attacked before the offender took his own life.
"The timeline of exactly what happened is unclear but we believe the two people died during the morning."
A post-mortem examination is due to take place later.
Neighbours, who described the couple as Eastern European, said three ambulances arrived at the home on Saturday afternoon.
'Feel for the kids'
One man, who did not want to be named, said one of the children initially refused to leave the property as they wanted to stay inside with the mother.
Another neighbour added: "It's such a shock, I can't believe it. Nothing usually happens here, it's really quiet.
"I just feel for the kids, you know, because they've lost their mum and their dad."