An Acre school was vandalized Sunday, with the words “Death to Arabs” and graffiti against the school’s administration were spray-painted across a wall in the building.

A flag pole at the site was set on fire as well, police said.

Earlier, a vehicle belonging to an Arab contractor was defaced in the northern city of Yokne’am and the words “price tag” accompanied by a picture of a Star of David were etched on its exterior. Two of the vehicle’s tires were slashed as well.

Tensions between Israeli Arabs and Jews in the Upper Galilee area have risen recently over a series of alleged attacks against Arab property in the region. Yokne’am alone has seen four different cases of alleged price tag attacks within one month.

Price tag is a term used to describe acts of vandalism and violence associated with the settler movement in retaliation for Palestinian attacks and to protest what they perceive as the Israeli government’s pro-Palestinian policies. Mosques, churches, dovish Israeli groups and even Israeli military bases have been targeted in such assaults.

Last week, a mosque in the northern Israeli Arab town of Umm al-Fahm was vandalized, its front door torched and a racist slogan spray-painted on its wall.

Earlier this month, dozens of tires were slashed on at least 15 cars in the Arab village of Jish in the Upper Galilee, and graffiti was scrawled on a wall, reading, “Only non-Jews [should be] removed from our land.”

Shin Bet officials said they believed an organized ring was behind the string of attacks, Channel 10 news reported.

Earlier this month, Foreign Minister Avigdor Liberman decried the wave of price tag attacks, saying they harmed Israel, especially its nationalist camp.

“The irresponsible people doing this, they are the same ones who attack IDF soldiers and officers who risk their lives to defend the State of Israel,” he said.

Itamar Sharon and Yifa Yaakov contributed to this report