The explosion, suspected to be caused by gelatin, damaged the main gate and brick fencing of Lt Col (Retd) ZS Zuala's residence besides damaging the building of his neighbour, police said.
The walls and windows of the neighbouring building were damaged, but no one was killed or injured in the explosion, they said.
Though no arrest has been made, Superintendent of Police of Aizawl C Laldina did not rule out the involvement of the Manipur-based Hmar People's Convention Democrats militants. Forensic experts examined the scene of the crime.
Mizoram Home Minister R Lalzirliana and other top officials also visited the place of the incident.

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