Security has been beefed at Delhi's Indira Gandhi International Airport after a banned pro-Khalistan outfit, Sikhs for Justice (SFJ), threatened to disrupt two Air India flights scheduled to leave for London on November 5, police said to PTI on Wednesday.

The US-based SFJ has issued a call to boycott Air India flights and urged the victims of the 1984 anti-Sikh riots to occupy the airport to "internationalise" the issue, they said.

Deputy Commissioner of Police (IGI Airport) Rajeev Ranjan said, "We have tightened security arrangements after we received inputs that Sikhs for Justice has threatened to disrupt operations of two Air India flights scheduled for London tomorrow."

"Even though the airport is a secure place, based on the inputs we received, we have made adequate security arrangements for the safety of passengers," he said.