Manipur Deputy Speaker M Shyam Kumar escaped unhurt when militants exploded a powerful bomb in interior Imphal East district on Monday.
However, two security personnel belonging to the India Reserve Battalion and Kumar's driver were injured by the splinters, official sources said.
The bomb, planted on the roadside, exploded when Kumar was passing through Okshu area, about 25 km from Imphal.
Kumar was returning to Imphal after visiting some places in his constituency in Imphal East district.
Heavy police reinforcements have been rushed to the area.