THE Julen rescue has entered the final stretch this afternoon. The tunnel has reached a depth of 3.15 metres, putting them just centimetres from where they believe the child is.
Spanish media are reporting two helicopters flying above the site where rescue workers are battling to free trapped two-year-old Julen.
The news potentially signals developments in the operation 60-metres below ground to build a 3.8-metre connecting tunnel to reach the boy.
Specialists miners have been digging for more than 20 hours, using pickaxes and small explosives to carve through the hard rock.
Initial estimates suggested works to the tunnel would be completed sometime this evening.
Once finished, rescuers hope they will be able to reach Julen in the 110-metre borehole he fell down on Sunday, January 13.
The connecting tunnel, which is being built at the bottom of a 60-metre hole specially drilled for the rescue operation, will take miners diametrically downwards until they reach a depth of 72 metres where they believe Julen may be.