A 42-year-old doctor has been mercilessly beaten to death allegedly by three youths, after the victim had protested harassing of his daughter by the accused in the district's Inchauli area, police said today.

According to an FIR filed by his relatives, victim Indresh Parashar was attacked last night by the three accused when he was returning from his clinic. The trio -- Nishu, Rahul and Mayank assaulted him with metal rods, sticks and clubs, police said.

Parashar ran to a nearby gymnasium to save his life but the assailants got hold of him there as well and beat him within an inch of his life and escaped thereafter, they said.

The police later reached the spot and took the grievously injured victim to a nearby nursing home where the doctors declared him dead.

One of the accused Nishu has been arrested and hunt is on for the remaining two, police said.

The assailants were sons of the victims' neighbour Ashwini Sharma in Ganganagar and used to often harass Parashar's daughter. The doctor then yesterday went to Sharma'a house and complained about the three, following which he was attacked, the complaint said.