Four people were injured in a shooting at a nightclub in Birmingham in the early hours of Saturday.
Police said one man remained in hospital in a critical condition, while the other three were being treated for less serious injuries.
Three people in their 20s and 30s have been arrested after the shooting, which happened at around 3am at Mango nightclub.
They were detained from a car on the M6 in Warwickshire a short time later, West Midlands Police said.
They remain in custody on suspicion of violent disorder as the investigation continues.
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Acting Chief Inspector Michael Clarke said: “This happened in a busy nightclub, on one of the main roads out of Birmingham city centre, so it’s vital that we hear from anybody who saw what happened or who may have captured it on dashcam as they went past.
“Our investigation is moving rapidly, and urgent inquiries have led to the arrests of three people, but we continue to investigate as we identify everyone involved.”