"OCA is looking into it, definitely," as well as organisers and the government, Singh told a press conference in the eastern Chinese host city, Hangzhou.
The three wushu fighters from the state of Arunachal Pradesh were issued stapled visas instead of stamped ones, India's foreign ministry said.
Wei Jizhong, chairman of the OCA's ethics committee, told reporters last week that China did not refuse entry to the athletes.
New Delhi vociferously rejects the claim, saying Arunachal Pradesh has always been part of India.
At the Asian Games, delayed by a year due to COVID-19, some 12,400 athletes from 45 nations are competing for 481 gold medals across a huge programme of 40 sports.
Persons:
Stanley Cheah, Raja Randhir Singh, Singh, Wei Jizhong, Tibet . New Delhi vociferously, Ian Ransom, Martin Quin Pollard, William Mallard
Organizations:
Hangzhou Olympic Sports Center, Olympic Council of Asia, Singapore, Reuters, Rights, Asian Games, OCA, Thomson
Locations:
Hangzhou, China, Rights HANGZHOU, Arunachal Pradesh, India, Beijing, Tibet . New Delhi, New Delhi