Tokyo Paralympics-bound Sumit Antil broke his own javelin throw world record in the F44 category with an effort of 66.90m to claim the gold medal during the National Para Athletics Championship here on Friday.

Antil, 22, bettered his own record of 66.43m which he had recorded during the Indian Grand Prix organised by the Athletics Federation of India at Patiala. He had competed with able-bodied athletes in that event.