Relatives of those killed in Saturday’s twin blast at a Siberian coal mine have been holding vigil at the site.
The death toll has now risen to 30 but scores more are still missing after a build up of methane gas in two areas of the mine ignited.
Another 40 were injured at the Raspadskaya pit which is Russia’s largest standalone coking coal producer.
Rescue teams are trying to find those still trapped underground although efforts were briefly suspended because of fears of further blasts.
It is believed 19 emergency workers are among the missing.
A recent spate of mine explosions and other underground accidents have prompted repeated calls from Russia’s leaders for improvements to creaking infrastructure and the stricter application of safety regulations.