One teenager is dead and at least three adult passengers have been injured after a train derailed in Kazakhstan’s region of Zhambyl. The train was going from the country’s capital Astana to Almaty, the biggest city in Kazakhstan.

“The train had a total of 20 cars, six of which derailed and three overturned. At the moment, we retain the following information: four people were injured, one of them is a teenager, he died, three adults were sent to the hospital,” the emergency service’s spokesperson Ruslan Imankulov said.

Video which appeared in social media shows passengers trying to get out of the train through broken windows.

Emergency services are working on the scene.

The shooting happened around 1:45am not far from police headquarters in Lawrence, in an area crowded with people from concerts, bars and events at the nearby University of Kansas, which was celebrating the start of college basketball season, AP reported.

Officers heard more than 20 gunshots, Interim Police Chief Anthony Brixius said. Brixius said responding officers found several people wounded in a large crowd.

Police didn’t say what led to the shooting, and no arrests had been made as of Sunday afternoon.

The victims who died were identified as 22-year-old Leah Elizabeth Brown of Shawnee, and Topeka residents Colwin Lynn Henderson, 20, and Dupree Dean, 24. None was a student at the school, according to university spokeswoman Erinn Barcomb-Peterson.

Brown’s mother, Gretchen Brown, said her daughter’s friend told her the two had just left Brothers Bar & Grill before the shooting. When the women reached the street, Brown said they saw a fistfight nearby. Then gunfire rang out, and Leah Brown collapsed.

The names of the wounded victims weren’t immediately released. They were being treated for injuries not believed to be life-threatening, according to police.

Lawrence resident Kyeeton Soukup told the Lawrence Journal-World he was inside Pyramid Pizza when someone came in and shouted, “Oh my God, there has been a shooting outside!” Soukup said he ran outside and saw two shooting victims on the sidewalk. He said paramedics arrived shortly after.

“Police were called just before 20:00 hrs on Saturday to the area around Stratford Shopping Centre to reports of a group of males spraying what is believed to be a noxious substance,” said the Metropolitan Police in a statement.

The police confirmed that at least six people were injured at different locations near the Westfield shopping center close to Stratford tube station, Xinhua news agency reported.

Footage and pictures posted by eyewitnesses on social media show police and emergency services attending victims at the scene.

The area has been cordoned off with London Ambulance Service and London Fire Brigade at presence.

One male has been arrested on suspicion of Grievous Bodily Harm (GBH), according to the police.

The incident is not being treated by Metropolitan police as terror-related, according to local reports.