The bodies of a mother and daughter have been found by police at a house in Sheffield.
Officers made the discovery at an address in Ironside Road in the Gleadless area of the city at 0740 BST.
A 25-year-old man from Sheffield has been arrested on suspicion of murder and is currently in custody being questioned.
The women have been named locally as Tracey Donnelly, 42, and her 23-year-old daughter, Louise Donnelly.
South Yorkshire Police said they would not confirm the women's identities until post-mortem examinations are conducted on Wednesday.
A four-year-old boy, a relative of the women, was also led from the property, wrapped in a blanket, by police.
Officers said they believed it was a domestic incident and the wider public were not in any danger.
Neighbours said police were called to the three-bedroom town house early on Tuesday.
One neighbour said she had seen 10 police cars and a forensic van at the scene, while another neighbour said she had been woken by a disturbance in the early hours.
Specialist officers are sifting through the house searching for evidence.