A high alert was sounded in Delhi and security beefed up in vital installations.
Police have launched a probe into the hijack threat call made to the Air India office while security has been stepped up at other airports.
High alert was sounded on Monday and security has been stepped up in Jammu, the winter capital of Jammu and Kashmir, following a bomb blast in Bengaluru.
Arunachal Pradesh sounded a high alert after a series of attacks by suspected NDFB(S) militants at Sonitpur and Kokrajhar districts of neighboring Assam.
Sources told IANS that Border Security Force (BSF) deployed on the international border in Jammu, Kathua districts and Samba districts have been put on maximum alert.
High alert has been sounded across India that 5 members of the banned SIMI, who had fled from a MP jail in 2013, are planning to carry out terror strikes.
According to the input, terrorists might carry out an attack in the port area of Kolkaya and may use small boats to carry out the strike.
The Odisha government on Tuesday put 16 districts on high alert after a cyclone threat.
Israel police on high alert as Jewish, Muslim festival dates coincide for first time in over 30 years
Israel police were on high alert to avert clashes as Jews and Muslims prepare to observe their faith's major holidays of Yom Kippur and Eid al-Adha.
In a video message Wednesday by its leader Ayman al-Zawahiri, al Qaeda vowed to "raise the flag of jihad" across the sub-continent as it sought to exploit the disillusionment felt by tens of millions of Muslims.
US media and intelligence agencies said today that al Qaeda has established a new branch to wage "jihad" in India, "return the Islamic rule" and impose sharia in the Indian sub-continent.
IB sources verified the video of Al Qaeda leader Ayman al Zawahri's threat to India and announcement of the formation of an Indian branch as aunthentic.
An alert was sounded in Jammu and Kashmir on Wednesday, a day after suspected militants hijacked a car on the Jammu-Srinagar national highway.
Arunachal Pradesh has sounded a high alert following the death of a 10-year-old girl due to encephalitis.
Uttar Pradesh police have been put on alert across the state for the holy month of Ramzaan, officials said on Monday.
An alert was sounded in Hyderabad and 13 districts of Seemandhra (Rayalaseema and coastal Andhra) as the central cabinet began a crucial meeting in Delhi to discuss the report of Group of Ministers (GoM).
"There shall be special checking of all vehicles, both private and commercial, entering the city from neighbouring states through border entry points," said Additional Commissioner of Police (Traffic) Anil Shukla.
The Intelligence Bureau has warned the Delhi Police about the possible threat, following which security situation has been reviewed across the national capital.