Jitendar Arjunwar, 15, was sent to Juvenile Prison in the country's Hyderabad city in Sindh province yesterday.
He had crossed the border near Khokhrapar and was arrested by Pakistan Rangers at Cheta chowk.
According to Khokhrapar police SHO Khurshid Bhatti, the teenager spoke both Urdu and English, the Dawn reported today.
The boy told police that his name was Jitendar Arjunwar, son of Aishurya Arjunwar, and that he was a resident of Madhya Pradesh.
He had a quarrel with his mother about two months ago and left his home in anger, he told police, adding that he kept wandering here and there in India.
He dug out soil beneath the wires and continued his journey. When he later became thirsty, he moved towards a place where he saw some light, the report said.
On reaching the spot, he found some people wearing military uniforms, who gave him water and inquired about him following which he told them his identity.