The explosion shattered 26 window panes and some window frames, the police said.
Police suspected that the explosive used was gelatin and the bundle of gelatin sticks must have been thrown from the main road as the compound housing the temple was encircled by the road.
The explosion came on the day when the opposition Mizo National Front (MNF) is organising a rally called 'Milem Biak Duhloh Kawngzawh' or Anti-Idol Worshipping Rally'.