After two weeks of huddling in a flooded cave in northern Thailand, several of the 12 boys who were trapped with their soccer coach have been rescued in a harrowing extraction that could take days to complete.

Divers on Sunday began pulling the boys to safety through long, narrow passageways that are challenging for even the most skilled cave divers. With the world watching, the rescue team was racing against rising floodwaters in what has become one of the most engrossing rescue missions in recent years.

Here is a look at other underground rescue attempts — some successful, some not — that have transfixed people around the world.

1975: Indian Mine Explosion Kills Hundreds

A blast at a coal mine in northeast India triggered flooding from a nearby reservoir that killed hundreds of miners.