Imphal: Intensifying their attacks ahead of the Assembly polls, unidentified militants exploded a bomb near the house of the Manipur Assembly Speaker I Hemachandra Singh in Imphal West district on Sunday killing one person and leaving atleast three wounded. The militants, who have been targeting Congress leaders and workers in the state going to polls on January 28, hurled the bomb outside the Singemei house of the speaker who is also a Congress candidate for the elections at around 6.15 pm. A passerby was killed and three others injured. (PTI)