Rescue begins of ailing US researcher stuck 3,000 feet inside a Turkish cave, Turkish officials say

Rescue has begun of ailing US researcher stuck 3,000 feet inside a Turkish cave, Turkish disaster management agency says.

Rescue crews were waiting for doctors to give the go-ahead for an operation to move out an American researcher who fell ill almost 1,000 metres below the entrance of a cave in Turkey, officials said. The effort could last up to 10 days.