Twelve spies were arrested in Rajasthan since 2013, parliament was informed on Tuesday.
Minister of State for Home Haribhai Parathibhai Chaudhary told the Lok Sabha that five arrests took place in the border state in 2013, three in 2015 and four so far this year.
He said in a statement that the government was pursuing a well - coordinated and multi - pronged approach to tackle cross - border espionage.
He said measures taken by the government include strengthening vigilance along the India - Pakistan border and gearing up intelligence machinery to interdict Pakistani agents.