A road accident in North Korea has caused “heavy casualties” among Chinese tourists, the foreign ministry in Beijing said on Monday.

The ministry provided few details but China’s state broadcaster CGTN earlier tweeted that more than 30 people died when a tour bus fell from a bridge in North Korea. The tweet was later deleted.

China was informed about the accident on Sunday night, and its embassy personnel in Pyongyang rushed to the scene and are working to manage the situation, the foreign ministry statement said.