Authorities in China are trying to reach three men trapped underground after the rail tunnel they were working on collapsed.

Despite being cut off for more than a week, they have been in touch with their rescuers, sending out footage of themselves as they try to dig their way out.

The plan to rescue them is to widen a narrow water pipe that runs below the collapsed tunnel .

The authorities have co-ordinated their digging with the trapped men so that they reach each other in the next two days.

Al Jazeera's Dominic Kane reports.

Source: Al Jazeera