A man was in custody on Saturday after an elderly couple were stabbed to death in their home.
A woman in her 70s and a man in his 60s were found dead in a cul-de-sac .
A man, 31, was arrested on suspicion of murder.
Neighbours in Whitton, South West London, described the pair as private people who would smile and wave at locals.
One woman said: “They were very humble and kept themselves to themselves.
“They were very quiet as English wasn’t their first language. But they were lovely and smiley.”
She added: “They spent a lot of time in the garden, laughing and joking.”
Neighbour Sanaulhaq Khan-Tokhi, 49 entered the house after hearing screams and found the pair.
One local woman said: “It’s utterly terrifying.
“I have lived here for 40 years and never known anything like this to happen.”
The couple had not been formally identified last night but police said they are not looking for anyone else in connection with the deaths and believe this to be an “isolated incident”.
