A government emergency response unit announced that more than 15 miners trapped in a gold mine on Wednesday in northwestern Colombia.
Rescue efforts are ongoing for 15 miners who are feared to have died after the mine flooded in Riosucio, in Caldas province around 220 km (136 miles) northwest of the capital, Bogota.
Officials estimate that a power outage or explosion in deep inside of the mine might have caused the flood.
"Search and rescue operations are under way. Up to now we have 15 people reported trapped in the mine," the National Unit for Management of Risk and Disasters said in a statement.
The government's mining agency confirmed that the mine has been running legally.
Leonardo Mejia who is the owner of the mine said several miners managed to escape when the accident occurred but 15 of them were stuck inside, he is afraid that all are dead.
Mining accidents are common in the country, 87 mine accidents occurred last year. In 2010, an explosion happened at a legally operated coal in Antioquia province, left 73 people dead.