Ousted Bangladesh Prime Minister Sheikh Hasina's son and adviser on Tuesday described allegations of corruption involving the family in the 2015 awarding of a $12.65 billion nuclear power contract as "completely bogus" and a "smear campaign".

BNP Senior Joint Secretary General Ruhul Kabir Rizvi Ahmed today said that neighboring India is conspiring to reinstate the ousted looter and fascist former Prime Minister Sheikh Hasina in Bangladesh.

Sheikh Hasina's son, Sajeeb Wazed, who spoke on behalf of the family, said they were targets of a political witch hunt in Bangladesh.

Bangladesh is investigating former leader Sheikh Hasina and her family for corruption, including misappropriating land and embezzling funds. Hasina left Bangladesh for India amid protests. An extradition request has been made.

Bangladesh has sent a formal request to India to extradite ousted Prime Minister Sheikh Hasina. She fled to New Delhi in August amid the student-led protests that ended her 15 years in power.

There was no immediate response to the allegations from Hasina, who has been living in India since she stepped down and fled from Dhaka in August.

Indian companies are participating in constructing the Rooppur nuclear power plant, which is being built by Rosatom, Russia's state-run corporation in Bangladesh.