JERUSALEM (JTA) — A monastery near Jerusalem was vandalized in an attack police believe is the work of right-wing extremists.

A firebomb was thrown at the Beit Gemal Monastery, which caused minor damage, according to police. The words “price tag,” also were spray-painted on the wall of the monastery.

“Price tag” refers to the strategy that extremist settlers and their supporters have adopted to exact retribution for settlement freezes and demolitions or Palestinian attacks on Jews. Several price tag attacks in recent months also have targeted Christian sites, however.

The damage was discovered Wednesday morning. The police unit for nationalist crimes is investigating the vandalism.