Police said Tuesday they still could not ascertain whether a fire in a West Bank mosque was caused by arson or an electrical fault.Following an examination of the site in the village of Luban a-Sharkiya, near Nablus, police sent the evidence to a forensics lab for further tests Security forces were investigating whether a group of settlers were responsible for Monday night's fire as part of their 'Price tag' campaign - generally referring to violence against Palestinians in retaliation for attacks on settlers and attempts to curb settlement activity. Pinchas Wallerstein, former chairman of the Yesha council of past and present Jewish communities in Judea, Samaria and the Gaza Strip, said in response to the 'price tag' accusation that "there is a group of people, not a large group, that instead of a proper and moral negotiation process, believe they can frighten and intimidate everyone in order to have their way.""These people are the minority, just like radicals on the Left, maybe even less," Wallerstein said in an interview with Army Radio.Wallerstein added that " I know the area, and the people, and according to what I know, there is no basis for suspicion. Even so, the conclusion in this situation is unequivocal: there are innocent people here, and they mustn't be harmed."Other recent 'price-tag' incidents included two Palestinian vehicles being set on fire near Kedumim and spray-painted with the words “price tag." In another incident, a mosque in the Palestinian town of Hawara, south of Nablus, was defiled by masked men who spray-painted a Star of David and the word Muhammad, in Hebrew, on the wall.