NEW : The bodies of two more children are recovered . Military divers are ordered to plan to raise the `` Bulgaria '' as soon as possible , the Defense Ministry says . More than 20 people are still missing . A man is pulled from a collapsed building in Sofia, Bulgaria, on Tuesday.
NEW : The bodies of two more children are recovered . Military divers are ordered to plan to raise the `` Bulgaria '' as soon as possible , the Defense Ministry says . More than 20 people are still missing . Four people face charges over what 's being called Russia 's worst river disaster .