The British Terrorism Police said on Sunday that the incident caused by a stabbing death at a site in southern England was read as a suicide bomber. Saturday night "has now been declared a terrorist incident."
"Officers from the South-East Terrorism Unit worked closely with police from the Thames Valley heavy-handed criminal ministry overnight," the police said in a statement.
Three people were killed and at least three others were injured in the attack at Forbury Gardens in Reading on Saturday night, local police said. A 25-year-old man has been arrested on suspicion of murder after he was arrested at the scene.
The 25-year-old Khairi Saadallah is from Libya, the BBC reported on Sunday.
Police said no one else was involved in the incident. Translated by: Mao Bopha January