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Three people were killed in an accident near Butterworth on Saturday night.
Police Captain Jackson Manatha says a fourth person was injured in the two car collision, on the N2 between Butterworth and Dutywa.
He says the cause of the accident is not known, and police are investigating a case of culpable homicide.
Manatha says the names of the deceased are still being withheld until their next of kin have been informed.