A rescue operation to free nine miners trapped since last Thursday in a mine in southern Peru could be delayed two to three days, according to a senior official.
Oscar Valdes, cabinet chief to Peru's President Ollanta Humala, said on Sunday that getting to the miners' location could take two or three days longer than anticipated due to new roof collapses inside the Cabeza de Negro mine, about 325km south of Lima, Peru's capital.
The miners have been trapped 820ft underground in a horizontal tunnel since Thursday when a shaft collapsed.
In addition to Valdes, the government sent in Jorge Merino, mining and energy minister, to try to get the crisis resolved safely.
The nine miners, aged 22 to 59 and including a father and son, were not injured and remain together. They were being supplied with oxygen, water and soup through a metal tube that they were also using to communicate with rescue workers.