The Israeli government on Sunday approved the use of administrative detention for Jewish far-rightists suspected of involvement in anti-Palestinian terrorism.
The diplomatic-security cabinet convened on Sunday evening for a special session devoted to the authorities' response to the arson attack believed to have been committed by far-right Jews in a Palestinian village.
An 18-month-old toddler was killed and the other family members seriously injured in the fire.
"The cabinet views the arson and murder in Duma as a terrorist act in every sense of the term," the government said in a statement.
"The cabinet is instructing the security services to take all necessary steps to bring those responsible to justice and to prevent similar acts in the future," it said.
The use of administrative detention has been approved by the attorney general, Yehuda Weinstein.