Militants are planning attacks in India: Australia

"We continue to receive reports that terrorists are planning attacks in India and assess that attacks could occur anywhere at any time with little or no warning, including in locations frequented by Australians. In mid-December 2014, Indian authorities increased security at Metro stations and other public spaces in New Delhi," read a statement in the Australian government's Smart Traveller website.

"Terrorist attacks in India have involved multiple, consecutive explosions and resulted in a high number of fatalities. Many past attacks in Indian cities have been indiscriminate rather than directed against a particular target, with the aim to inflict mass casualties," it said.

It said, "Terrorist groups regularly issue statements threatening to launch attacks in India and Indian security services have warned that attacks may occur. In September 2014, Al Qaeda announced the formation of an offshoot in the Indian Subcontinent. Most recently, militants based in Pakistan threatened attacks in India following the 2 November 2014 suicide bombing on the Pakistani side of the border with India at Wagah, which killed at least 55 people. In 2014, Indian authorities made a number of arrests of suspected terrorists accused of planning terrorist attacks in India. "

The Australian government said the threat of terrorism exists in all Indian cities and tourist centres.

"We advise you to exercise a high degree of caution in India overall due to the high threat of terrorist activity. Pay close attention to your personal security at all times and monitor the media for information about possible new safety or security threats," urged the government to the Australian citizens.

The Australian government warned women and urged them to take particular care while traveling in India.

"Women should take particular care in all parts of India, including major cities and tourist destinations, even when travelling in a group. Exercise vigilance at all times of the day, avoid walking in less populous and unlit areas, including city streets, village lanes and beaches, and take care when travelling in taxis and rickshaws. Avoid travelling alone on public transportation, autos and taxis, particularly at night. Foreign women can be subjected to unwanted attention and more serious harassment and assault. Successful prosecutions are rare. See our travelling women page for more information," read the statement.