Police are investigating the bombing of the three houses of San Jorge, Samar Mayor Joseph Grey.
The series of explosions occurred separately on Tuesday.
Reports reaching police say, the first blast took place in the Mayor’s house in Barangay Mancol at about 3 am.
Unidentified suspects on board a motorcycle hurled a grenade.
The incident injured a policeman and the mayor’s security aide.
The second and third blasts happened in the other houses of Grey in Barangay Aurora and along China road.
Three days before, the three sons of Grey were tagged in an attempt to kill Lester Bisnar and his aide.
Bisnar was the rival of Grey in the 2016 mayoralty race.