A major breakthrough has been achieved in the probe into the 11/7 serial bomb blasts in commuter trains in Mumbai, Union Minister for State for Home Sriprakash Jaiswal said in Raipur on Friday.
"In a major breakthrough, we have understood the conspiracy behind the blasts although the accused are yet to be arrested," Jaiswal said.
"Many things are clear now after the investigation but it will take time to reach to the crux of the matter," he said.
Since the security forces have understood the purpose of the blasts, all preventive measures have been taken so, it will be tough for anyone to carry out such blasts in the country, he said.
"We are serious about the internal security challenges and besides using forces, we want to adopt other methods to deal with terrorists activities," Jaiswal said when asked about recent incidents of violence in Northeastern states.
"Assam, Manipur and other Northeastern states are comparatively peaceful now and people need not be worried about the stray incidents of violence there," he said.