This is the third attack of this kind in the capital of Manipur, Imphal, in the past two weeks, said police.
A police spokesperson told the media that the explosion took place outside the residence of Congress party candidate I. Hemochandra Singh on the outskirts of Imphal at around 18:15 p.m. local time.
The attacker used an improvised explosive device that went off, killing one by-stander and injuring three pedestrians.
Three people were injured in a grenade attack on Jan. 10 when unidentified militants lobbed a grenade outside the residence of another politician. On Jan. 6, a ruling Congress party election office came under a grenade attack, but no one was injured.
Manipur is due to hold elections to its 60-member legislative house on Jan. 28.
Some local militant groups have called for a ban on all election meetings and campaigning by the Congress candidates in the state.
(H-AK)
Editor: Ella Syafputri
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