Four people dead in London stabbing

Four people are dead, including a grandmother, after a stabbing attack in a London house early Monday morning.

A suspect, described as a man in his late-20s, is in custody, London's Metropolitan Police announced. Authorities believe the alleged perpetrator knew his victims, whom emergency responders pronounced dead on the scene.

Officials are not investigating any other suspects at this time.

Law enforcement is in the process of notifying the next of kin. Venecia Reid identified her aunt Dolet Hill, a woman in her mid-60s, as one of the victims, The Guardian reported.

"She was very loving, very kind, very generous. She worked very hard in this country to support her two girls and her two grandkids. She does not deserve this," Reid said.

Authorities believe the other victims include a man also in his mid-sixties and two women in their 40s and 30s, Metropolitan Police Commander Colin Wingrove said.

"We will leave no stone unturned in discovering the facts," Wingrove stressed.

London Mayor Sadiq Khan said he is "heartbroken" about the "devastating incident."

"My thoughts are with the family and friends who have lost loved ones in this awful crime," he tweeted.

The United Kingdom has strict knife laws. 

It is illegal to "carry any knife in public without good reason, unless it has a manual folding blade less than 3 inches long," according to GOV.UK.

From March 2021 to March 2022, more than 2,800 people in London were found to be in possession of an article with a blade or a point, police department data shows.