Another grenade was thrown at a Japanika restaurant in Rosh Pina on Wednesday morning, in the latest of a string of violent incidents against branches in the chain.
According to the Israel Police, forces arrived at the scene shortly after a report of an explosion, and an investigation is ongoing.
In the span of a few hours overnight on Tuesday, police had announced two grenade explosions, a pipe bomb attack, and an attempted arson. Three of the incidents targeted branches of the Japanika restaurant chain, owned by businessman and Beitar Jerusalem owner Barak Abramov.
None of the incidents had any reported casualties.
Police arrest suspects in Japanika attacks
Police also arrested Musli crime family boss Yossi Musli on Tuesday in connection with the series of attacks against the restaurant chain.
Later, the police announced that three more people had been arrested in connection with the Japanika attacks: an 18-year-old man and two men in their 30s, all from central Israel.
Hodaya Ran contributed to this report.