NEW YORK ( TheStreet) -- At least 20 coal mine workers have been killed and six more injured on Wednesday in a blast in a Colombian mine, officials told Reuters.

The explosion was most likely caused by a methane buildup, the governor of the Colombian state of North Santander told CNN.

Local officials say the Red Cross has recovered five bodies. Rescuers believe 16 workers are still trapped in the collapsed mine. Officials say there is little chance that they are still alive.

The injured workers have been taken to the hospital, national civil defense agency spokeswoman Helen Garcia said. A total of 30 people were in the mine at the time of the explosion.

The mine is located in the Norte de Santander province in northeast Colombia, near the border with Venezuela.

--Written by Theresa McCabe in Boston.

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