This is the heartwarming moment a one-year girl was rescued after spending 18 hours trapped in a 50ft deep well.

The youngster named Tasa Mo-ei plunged into the narrow pit when she wandered away from her parents who were working in a nearby cassava field in Tak, northern Thailand, on February 6.

Dozens, including police and firefighters, rushed to the scene after receiving a report at 4 PM. They lowered a camera to check on Tasa Mo-ei's condition, finding her still alive and responsive.

The team filled the narrow space with oxygen from tanks and commenced with the mission widening the well's hole first using excavators, and later by hand.

Inredibly, the narrow well used for pumping water was widened into a gaping 70ft wide cavern which allowed the team to reach the girl without earth collapsing around her.

The mission was a success, and the girl was finally pulled from the ground on Tuesday at 10:40 AM local time. The responders said they were operating under low visibility and were careful to pave a way to the child without hurting her.

Tasa Mo-ei's relieved father Necho, 26, and mother Atay, 20, broke down in tears when the youngster was pulled out alive.

Necho said: 'I am so happy, it is like a miracle. My daughter was in the well for so long. I was praying all night that she would be alive. We will never stop watching her now.'

The couple said they were hired to work in the fields and had brought their daughter along.

They left the toddler unattended under the shade of a tree and went to plow at the plantation, only to find her missing when they returned.

Frantic Atay called out the child's name several times, and was shocked to hear her voice from inside the deep hole.

Tasa Mo-ei has been rushed to a hospital as she had spent over 16 hours trapped inside the well.

Rescue worker Kittisak Boonjan said: 'This was very difficult because three excavators were used and we could not allow the soil to fall onto the girl. We monitored her the whole time using a camera to make sure she was breathing.

'Everyone was emotional when she was brought out. It was a succeszsul rescue.'