Arsonists have torched a Jerusalem mosque and scrawled anti-Muslim graffiti on its walls, Israeli police said Wednesday.

Ultra-Orthodox Jews look at graffiti sprayed outside a mosque in Jerusalem Dec. 14, 2011. (Ronen Zvulun/Reuters)

Hours later, police arrested six suspected Jewish extremists in an apartment raid, but police spokesman Micky Rosenfeld said those arrested were not believed to be involved in the mosque torching. He said they were detained in connection to “recent events.”

The Israeli government has vowed to punish those responsible for the spate of attacks. Prime Minister Benjamin Netanyahu has promised to “take care of these attackers with a firm hand” and Defense Minister Ehud Barak has dubbed the attacks “homegrown terror.”

Lawmaker Shaul Mofaz told Army Radio Wednesday that the government was not doing enough to combat “groups of Jewish guerrillas.”

“These hooligans are terrorists for all intents and purposes,” said Mofaz.

The mosque attacked Wednesday was left with “price tag” spray-painted on its walls, which the Associated Press reports is “a reference to Jewish extremists’ practice of exacting retribution for government action against settlements.”

The attackers also left graffiti that read “Mohammed is dead” and “A good Arab is a dead Arab.”

Police have detained at least 21 people this week in connection with the attacks.

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