New Delhi, Dec. 30 -- The Air India Express pilot, accused of assaulting a passenger at the Indira Gandhi International (IGI) Airport, joined the investigation and is being questioned, Delhi Police said in a statement on Monday.

"Captain Virender Sejwal has joined the investigation. If the IO (Investigating Officer) isn't satisfied with his reply, he can be arrested in the assault case. Investigation is being carried out in the matter based on merits and available evidence," Delhi Police said.

Earlier, Ankit Dewan, who alleged that he was assaulted by an Air India Express pilot at Terminal-1 of Delhi's Indira Gandhi International (IGI) airport, said the incident occurred during security checks while he was travelling with his family.

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