The first grenade damaged the wall of a pavilion near the house while the second grenade hit a tree.
Police inspected the scene yesterday. They said district chief Supol Phokaew had returned from inspecting sub-district election booths and was in the house when the grenades were fired.
Inquiries revealed that district chiefs have been targeted for years, such as a 2008 incident in which then district chief Wirat Prasetso and several other officials were injured in a bomb attack in Krasoh sub-district. Last year M79 grenades were fired at the home of then district chief Pisal Awae – but missed, and on February 4 Pisal was ambushed by gunmen while going to work but emerged unharmed.