Two illumination bombs were fired near Israeli Prime Minister Benjamin Netanyahu's home in Caesarea on Saturday evening, the Israel Security Agency (Shin Bet) reported.
The projectiles landed in the home's yard.
The family was not at home at the time.
"This is a serious incident which represents a dangerous escalation," the Shin Bet stressed.
The incident occurred around 7:30 p.m. Saturday evening. Shin Bet and police forces were called to the scene, and an investigation has been opened.
Later, the Israel Police and the Shin Bet announced that three suspects were arrested in connection with the incident.
The three were transferred for joint interrogation by Shin Bet and the Lahav Unit 433 of the Israel Police. The court has imposed a 30-day gag order on the details of the investigation and the identities of the suspects in order to prevent disruption or harm to the investigation.