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The parents of a toddler who has been trapped down a deep well in Spain for more than three days were clinging to hope Wednesday as rescuers revealed they expect to reach him within 48 hours.

Crews have worked around the clock digging an intersecting tunnel to free the two-year-old boy, whose first name is Yulen.

His father, Jose Rosello, said the ordeal has been difficult but added he's feeling encouraged as rescuers inch closer.

"My wife is broken ... we are dead inside," Rosello told reporters on Wednesday. "But we hope we have an angel to get my son out of there."

The site of the rescue operation. Alvaro Cabrera / EPA

The well is located in Totalán, a town in the southern province of Málaga.

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It is about 360 feet deep and only 10 inches wide.

A few hairs found in the soil extracted from the well during the rescue operation provided DNA matching the boy's, said Maria Galvez, a government official at the site on Wednesday. That confirms that he's inside, she added.

Rescue teams start opening a new hole to reach where the toddler is trapped. EPA

An attempt to send down a robotic camera on Monday was only partially successful. The device made it only 229 feet below the surface when the hole became too narrow for it to go further. However, it managed to spot candies Yulen had been carrying.

Efforts were made to widen the well but hard rock has impeded machinery from getting past the 262-foot mark, according to Galvez.

The country's air force transported a mining rescue team to the town to support crews already at the site.

The specialists were on site Wednesday aiding in the dig of an intersecting tunnel, which has to be executed carefully to prevent an internal collapse within the well.

Galvez said that crews expect to reach the deepest portion of the well by Friday.

"Now they are making progress ... we have a bit more hope," the boy's father said.

Meanwhile, a Swedish firm that helped locate 33 Chilean miners who were trapped in a collapsed mine for 69 days in 2010 has agreed to help in the search for the boy. The firm is providing access to a tool that could help locate Yulen.

The toddler's parents have been waiting at the surface and receiving support from a group of trauma experts and psychologists.

The family were having a countryside meal in the mountainous area when the boy disappeared.