..and the source of this threat is..?
This is all the BBC have:
Indian authorities have put three major airports on high alert after a threat of possible attacks by militants who claimed last week's Mumbai attacks.
Extra checks are being carried out at the airports in the capital Delhi and the cities of Chennai and Bangalore.
The threat came from the previously unknown Deccan Mujahideen, which said it carried out the multiple attacks in Mumbai that killed at least 188.
India says the attackers had links to Pakistan, which has denied any role.
http://news.bbc.co.uk/1/hi/world/south_asia/7764142.stm