A domestic airliner flying from India's tourist state of Goa made an emergency landing in New Delhi today after a passenger became unruly and said he was carrying a knife, an aviation official told Reuters.
The plane was taken by the pilot to an isolated bay at the Indira Gandhi International Airport, where national security guard commandos have surrounded it.
It was not immediately clear how many passengers were on board. The flight landed at about midday GMT, officials said.
"There were couple of passengers behaving aggressively who also said that they would hijack the plane," a Ministry of Civil Aviation statement said, adding an anti-hijacking drill followed.
India has been tense since November when attacks by Islamist gunmen in Mumbai killed 179 people. There have been a string of bombings in other cities over the past year.
Reuters