The death toll at the Colombia coal mine where an explosion occurred last week has risen to 70, with rescuers recovering more dead bodies from the site.

On Friday 23 bodies hade been recovered.

According to AFP, rescuers struggled to locate bodies after the 16 June blast, with fears heavy gas concentrations in the mine could set off another blast. Some of the track inside the mine had also been damaged.

The miners were trapped 6,500ft below the surface following the explosion in north-western Antioquia province.

It is thought that a build-up of methane gas led to the explosion in the privately owned mine, which, according to reports, did not have gas detectors or chimneys installed.