Two people are missing and two others were seriously injured when an ice cave collapsed in south-east Iceland while a tour group was visiting the area, police have said.

A group of 25 people were on an organised tour of the Breiðamerkurjökull glacier with a guide when the cave collapsed.

“Four people got stuck under the ice, two people have already been rescued from the ice and are seriously injured,” Sudurland police said on Sunday.

“The search is still on for the two people trapped in the ice cave,” the statement continued.

Icelandic media reported that two helicopters from the country’s coastguard had been dispatched, and ambulances and police had also been called to the scene.

The glacier where the accident happened is near the glacial lagoon Jökulsárlón, one of Iceland’s more popular tourist destinations.