Shortly before 11 o'clock police received multiple calls alerting them of them an explosion heard on Rehov David Raziel in Herzlia.
Police under the command of the Yarkon sub-district commander streamed to the scene of the blast which turned out to be the house of Herzlia's city manager's house.
Bomb squads on the scene said that evidence indicated that a fragmentation grenade had been tossed at the house causing minor structural damage.
Nobody was wounded in the blast.
Earlier this week a similar incident occurred when a grenade was thrown at the house of Nahariya's mayor, Jackie Sabag.