A rescue operation is underway to save a five-year-old boy who fell into a 150ft borewell in western India three days ago.

Aryan Meena was playing in a field when he fell down the narrow borewell in Dausa city in Rajasthan state at around 3.15pm on Monday, his father Jagdish Meena told reporters.

A city official said the boy appeared to be lying unconscious and rescue workers had pushed down a pipe to supply oxygen.