A powerful bomb explosion took place near the Manipur governor's residence in Imphal, where President Pratibha Patil is staying, officials said on Friday.
The bomb, allegedly planted by militants, went off at 11 pm on Thursday at Ananda Singh Academy, about 2 km from Raj Bhavan, where the President was staying, they said.
No casualty was, however, reported in the blast.
Patil is on a two-day visit to Manipur.
Police and central forces are conducting round the clock patrolling and forces were deployed at all vulnerable points. President will today lay the foundation
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