MEXICO CITY, Sept 29 — Two people were killed and two more injured when a rollercoaster carriage derailed at a theme park in Mexico, authorities have said. 

Early reports suggest a mechanical problem caused the carriage to become detached from the ride and fall some 10 metres to the ground, the public prosecutor said in a statement.

It is believed the two men died as a result of head injuries, it added, while two woman were taken to hospital — one of them in a serious condition. 

The accident happened at La Feria amusement park in the capital Mexico City yesterday.

In a Twitter post, the theme park said it "deeply regrets the terrible accident” and it has launched an investigation into the incident. — AFP