The accident, which involved two trains, occurred on a bridge linking the Danish islands of Zealand and Funen, a Danish police spokeswoman said. Police were first called at 7:35 a.m. (1:35 am ET), she said.

Passengers have been evacuated from the train but police and rescue teams are still working at the scene.

A spokesman for brewing company Carlsberg told CNN that Carlsberg beer was being transported on a freight train over the bridge. “The train was carrying our goods apparently, but we do not transport our own goods in Denmark,” said Kasper Elbjorn from Carlsberg, which has its headquarters in Copenhagen. The beer was carried by Deutsche Bahn Cargo Scandinavia, he said.

No cause for the accident has been established yet by police but the two trains may have had contact, the police spokeswoman said.