A man has been arrested on suspicion of murder after four people were stabbed to death in London.
Three women and a man were found dead after a reports of disturbance at a property in Southwark shortly after 1.30am, the Metropolitan Police said.
All four people, who were found inside the property, were pronounced dead at the scene.
Police said a man was arrested on suspicion of murder and taken to a south London police station where he remains in custody.
It is thought that all five people were known to each other.
The Met Police said officers were called to the property in Delaford Road and forced entry to get inside.