A grenade was also lobbed at residence of intending candidate Ahanthem Sanjoy of Wangoo Sabal under Kumbi Police Station.
According to police, the bomb was hurled and exploded at around 6:45 pm inside the residential campus of Ningthoujam Diten.
The arrested person has been identified as Naoroibam Joyshankar alias Loyumba alias Khougang, 37, son of N Inaocha Singh of Lairikyrngbam Makha Leikai, Imphal West.
The government will take firm action against people behind the blast and will ensure safety of the people of the state, CM Conrad Sangma said
On Tuesday night at around 7.20 a hand grenade exploded in the campus of the AMSU headquarter located inside the campus of DM University, Imphal West.
Miscreants lobbed a hand grenade which exploded in front of All Manipur Students’ Union (AMSU) head office gate at about 7.20 pm on Tuesday.
The bomb was found at around 8.15 am on the southern side of the main gate of the camp, about 10 meters away from the spot where one bomb exploded on Wednesday late evening.