A collapse at one of Colombia's many unlicensed mines has killed three people and left another 13 missing under tonnes of mud and rock, rescue officials say.
As anguished relatives looked on from behind a security perimeter 24 hours after the tragedy in western Colombia, six backhoes clawed at the earth to try to get to the missing.
Both men and women are among the missing, said Alexander Sanchez of the Red Cross in western Cauca state, who revised the initial missing toll of 30.
"It will be hard to find survivors," he said.
Cauca police said three bodies had been pulled from the earth.
The number of missing could rise because so far it is based on reports from relatives and others may not yet have come forward.
Luz Holanda Nazarin, whose nephew was among the missing, said she had given up hope.
"Not even God knows where they are," the 50-year-old said.
Rescue workers were waiting for the heavy machinery to remove enough mud to send in sniffer dogs. But they said lots of earth still had to go before they could do this.
Cauca state firefighters chief Victor Claros said the accident happened at a mine outside the city of Santander de Quilichao, where independent mine workers were digging for gold without a licence.
Colombia has more than 14,000 mines, more than half of which operate without proper permits, officials said. It was the second mining accident in Colombia in less than a week.
Last Saturday in the northwestern department of Antioquia, four miners died from inhaling toxic gas in an unlicensed mine.
The National Mining Agency says that from January to September of 2013 there were 66 accidents in Colombian mines, causing 71 deaths and 51 injuries.
View of backhoes at the site where rescuers and authorities participate in rescue efforts after a landslide at an illegal gold mine near San Antonio, Santander de Quilichao, in the Colombia (AAP)
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