Man arrested after four people stabbed to death in London

A man has been arrested on suspicion of murder after four people were found dead with stab wounds in London’s south.

Emergency services were called about 1.40am today (10.40am AEST) to Delaford Road in Southwark, where police forced entry to a home.

In a statement, the Metropolitan Police said three women and a man found suffering apparent stab wounds were pronounced dead at the scene despite the best efforts of first responders.

Police said the suspect, who was in custody at a south London police station, and the four who died, were believed to have known each other.

Police, including detectives from Specialist Crime, were investigating and contacting next of kin.