"All our investigation agencies have full-fledged autonomy...There is no interference from our side or from the government's side," he said while interacting with reporters on the sidelines of a Border Security Force event here.
National Investigation Agency (NIA) had last week, in a complete U-turn, dropped all charges against Sadhvi Pragya Thakur and five others in the 2008 Malegaon blast case. Charges under the stringent MCOCA law were dropped against all the other 10 accused, including Lt Col Prasad Shrikant Purohit, as part of its charge sheet filed in a Mumbai court.
"That time Pakistan's response was positive...NIA also wants to go there and talks have taken place at the Foreign Secretary level," he said.
The Home Minister termed the outcome in the Assembly polls as a "spectacular" win for BJP.
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"BJP got a spectacular win...It has a clear majority in Parliament. It also a party which has formed government in 14 states on the power of either its full-fledged majority or by way of coalition. A big geographical area has been covered by BJP," he said.
"This is their internal matter. I will not like to comment. How to rectify, what to rectify, it's Congress' decision," he said.
Singh said that the Cabinet will soon take a decision on the issue of allowing special risk allowance for troops of paramilitary forces serving in Left Wing Extremism (LWE) areas on par with what is given to those who serve in the counter- insurgency grid in the north east and counter-terrorism and anti-militancy operations in Jammu and Kashmir.
Assembly polls next year, Singh said his party was into politics not for forming government but for strengthening the country.
"We do not do politics to form government but to make the country," he said, adding BJP was in power in Uttar Pradesh for a very brief time but it never compromised on corruption.
"On the other hand, BSP and SP have been in power for a long time but neither unemployment nor corruption has been checked," he said.
"Goondaraj is continuing in the state...On coming to power no goonda or mafia will be able to roam about freely in the state," he warned.
"After Vajpayee, Narendra Modi is working to uplift the country at the global level," he said, noting that his party was not against any particular person but against any wrong.
Singh also had a dig at Congress vice president Rahul Gandhi for his claims of having evidence which will bring an earthquake, saying the young Congress leader has been speaking all this while but there has never been any movement anywhere.