MADRID (AP) — Rescuers in southern Spain say that the frantic effort to reach a two-year-old boy who fell into a narrow, deep borehole seven days ago has again been slowed by difficult terrain.

Provincial authorities say Sunday that a drill used to create a vertical shaft parallel to the waterhole has hit a rocky patch.

There has been no contact made with Julen Rosello, who fell into the 110-meter (360-foot) deep shaft on Sunday in the countryside northeast of Malaga.

Experts are hoping to reach the toddler by digging a horizontal tunnel to the spot where they believe he is trapped.

Rescuers hope to find him at a depth of 72 meters (236 feet), where a soil blockage has hampered efforts to save him.

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