Israel arrested several suspects on Sunday in a crackdown on Jewish extremists linked to the West Bank arson attack that killed an 18-month-old child and his father, security officials said. Israel Police and the country's top security agency - Shin Bet - detained nine suspected Jewish extremists in raids on two illegal outposts in the West Bank known to harbor Jewish extremists, reported JTA.

Israel's security agencies, as part of the crackdown, also placed two more alleged Jewish fanatics in detention without trial.

"Meir Ettinger and Eviatar Slonim, who were arrested in recent days, have been placed in administrative detention for six months with the possibility of extension," the defense ministry said in a statement, according to BBC.

The crackdown comes after the deadly July 31 arson attack in Duma village of West Bank that killed 18-month-old Ali Saad Dawabsha. The child's father, Saad Dawabsha, who was injured in the firebombing on their house, died on Saturday.

The deadly firebombing also critically wounded the child's mother, Reham, and four-year-old brother, Ahmad, who are still in the hospital, according to Middle East Eye.

Israeli Prime Minister Benjamin Netanyahu condemned the arson attack and vowed to find the perpetrators and bring them to justice, according to a statement issued by the Israeli Prime Minister's Office on Saturday.

"When you stand next to the bed of this small child, and his infant brother had been so brutally murdered, we're shocked, we're outraged. We condemn this," Benjamin Netanyahu said after visiting Ali's mother and brother at the Chaim Sheba Medical Center.

"There is zero tolerance for terrorism wherever it comes from, whatever side of the fence it comes from, we have to fight it and fight it together," he said in statement.

The Palestinian Authority, however, blamed the Israel government for the deadly arson attack on Duma family. Authority's Foreign Minister Riad Malki said Saturday that the extremist right-wing Israeli government is fully responsible for the arson attack, according to Jerusalem Post.