Antony was replying to a question in Lok Sabha as to whether the Army's Leh-headquartered 14 Corps had reported about mysterious UFOs flying over the India-China border during the last three years.
"Required measures have been initiated through development of infrastructure and operational capabilities to achieve desired levels of defence preparedness to safeguard the sovereignty, territorial integrity and security of India," Antony assured the house.
Antony also said that the situation in Jammu and Kashmir is stable.
"The situation in J&K has stabilised due to the persistent proactive counter-terrorist operations carried out by the government," he said in response to a separate question on the situation in the state.
Providing details of killings in Jammu and Kashmir during last three years, Antony said that while 13 civilians were killed between 2009 and October 2012, 58 terrorist were gunned down during the corresponding period last year. The highest number of terrorists (245) were killed in 2009.