"We want to know from the government if the news is true or not. If it's true, we want explanation from the government to this end," said acting secretary general Mirza Fakhrul Islam Alamgir of ex-prime minister Khaleda Zia's Bangladesh Nationalist Party (BNP).
If the report was true, the government must also explain how an agent of a foreign country could enter into the country and how agents of another country could capture him from Bangladesh's soil, Alamgir said.
The report said Waqas, an ISI agent who had been loaned to IM, was due to leave for Pakistan via Nepal when the RAW operatives caught him at the Dhaka's Hazrat Shahjalal Airport and managed to take him to New Delhi.
Bangladesh police expressed their ignorance about the incident, with a senior police spokesman saying "we have no idea of any such incident at the airport".