NEW DELHI, India (CNN) -- Indian police swiftly handled a "security scare" at New Delhi's major airport early Friday amid heightened concern in the wake of last week's terror attack in which gunmen killed 179 people in Mumbai.



An Indian soldier joins the beefed up security detail at New Delhi airport.



New Delhi police spokesman Rajan Bhagat said police responded to reports of gunfire at Indira Gandhi International Airport but found no casualties or damage. Bhagat said there was "no terror threat."



"And there's no cause of panic," he added.



Uday Banerjee, the head of India's Central Industrial Security Force, told reporters at the airport that something sounding like gunshots was heard, but no one saw anything and no bullet casings were found.



Indian authorities stepped up security at the nation's airports on Thursday after receiving intelligence reports that terrorists might be planning an air attack.



At Indira Gandhi, four armed police stood guard at each entrance, and people waiting for arriving passengers were not allowed inside.  Watch what triggered the security scare there »



"There have been intelligence inputs about some terrorist activity, and therefore security has been tightened (at airports)," civil aviation spokesperson Moushmi Chakraborty told CNN.  Watch heightened anxiety after the attacks »



Police beefed up security at all airports including in the capital New Delhi, Mumbai, Chennai and Bangalore, Chakraborty said.



A spokesman for the Indian Navy, Cmdr. Nirad Sinha, also confirmed to CNN that security officials had received warnings about an airborne attack.  Watch more on increase in security »



The Press Trust of India, a nonprofit newspaper cooperative, said that reports had suggested that terrorists could have sneaked into the country to carry out strikes on the anniversary of the Babri mosque demolition. The mosque -- one of the largest in the Uttar Pradesh state -- was destroyed on December 6, 1992, by Hindu nationalists who believe it was built on the site of an existing temple.



On Wednesday India's defense minister met with the chiefs of the army, air force and navy and discussed what the ministry in a news statement called "possible terror threats from air."



The officials also discussed the country's coastal security plans and how to tighten security along the military line of control dividing the disputed region of Kashmir between India and Pakistan to "prevent infiltration of terrorists," the statement said.



India ranks among the countries where terrorism is most common, according to the U.S. State Department.



CNN's Harmeet Shah Singh and Sara Sidner contributed to this report.
Where was security raised? When is the possible strike supposed to occur? Who discussed the country's security plans? Who discussed country's security plans? Who reported that there might be an attack on Dec 6? What caused security to be raised? Who said that there was no cause for panic? When do reports say there could be a strike?
New Delhi airport. the anniversary of the Babri mosque demolition. India's defense minister met with the chiefs of the army, air force and navy and India's defense minister Press Trust of India, last week's terror attack in which gunmen killed 179 people in Mumbai. New Delhi police spokesman Rajan Bhagat on the anniversary of the Babri mosque demolition.
question: Where was security raised?, answer: New Delhi airport. | question: When is the possible strike supposed to occur?, answer: the anniversary of the Babri mosque demolition. | question: Who discussed the country's security plans?, answer: India's defense minister met with the chiefs of the army, air force and navy and | question: Who discussed country's security plans?, answer: India's defense minister | question: Who reported that there might be an attack on Dec 6?, answer: Press Trust of India, | question: What caused security to be raised?, answer: last week's terror attack in which gunmen killed 179 people in Mumbai. | question: Who said that there was no cause for panic?, answer: New Delhi police spokesman Rajan Bhagat | question: When do reports say there could be a strike?, answer: on the anniversary of the Babri mosque demolition.