Story highlights Israeli authorities have been cracking down on right-wing extremists after a deadly attack

A Palestinian toddler and his father died after an arson attack on their home in late July

Jerusalem (CNN) Israeli police took alleged "extreme right-wing activists" into custody overnight, a spokeswoman said Sunday.

"Following recent events in the Judea and Samaria district, the unit for nationalist criminal activity carried out during the overnight hours a few searches and arrests in various outposts in the Binyamin region," Luba Samri said.

Judea and Samaria district is the Israeli term that corresponds to the Palestinian West Bank.

But Israeli authorities suspect the attack may have been carried out by Israeli far-right extremists, and the government has vowed a thorough investigation and a rigorous law enforcement follow-up.

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