Twelve people have been arrested after a collision that killed seven people, including two police officers, Cleveland Police says.
Nine men and three women, aged 19 to 61, have been arrested across Teesside, England, on suspicion of offences including participating in the activities of an organised crime group.
Two police officers were killed when a Volkswagen Passat collided with their marked car around 03:30 BST on Saturday; the five people in the other vehicle were also killed.
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