The use of the Internet for political campaigning was thrown into question yesterday, as police investigated a Muslim pressure group's Web site on suspicion that some of its material may be defamatory. A Singapore police statement said that, acting on instructions from the attorney-general, officers had started a probe into three articles carried by Fateha.com. The move follows harsh exchanges between Fateha's campaigners and government ministers this year over the city-state's response to the war on terrorism and the country's relations with Israel. Fateha activists, including the group's former head, Zulfikar Mohamad Shariff, also have locked horns with ministers over a government ban on Muslim girls wearing Islamic-style headscarves in state schools. The attorney-general, the government's principal legal adviser, directs criminal prosecutions in the city-state. Police said three articles posted last month raised concerns that they may constitute criminal defamation. Offenders face a maximum penalty of two years in jail and a fine. Representatives from Fateha were unavailable for comment. Police said the first article was entitled 'Is Yaacob Ibrahim a hypocrite', referring to the minister-in-charge of Muslim affairs and one of Fateha's fiercest critics. The second, titled 'The real reason for forcing girls to remove hejab', dealt with the row over headscarves in schools. A third covered the recent controversial appointment of Deputy Prime Minister Lee Hsien Loong's wife to a senior role in Temasek, the government's main investment arm. The police statement did not say who had written the pieces under investigation. The opening of the Fateha probe came just one day after Mr Zulfikar was fined S$600 (HK$2,640) by the local court for trespassing in a police station on May 1. A separate police statement said officers also had seized a computer from a flat in Bukit Batok, a northern suburb, in connection with two separate online articles that may be defamatory. The statement said it was 'premature' to determine if the Bukit Batok case was related to the Fateha probe. About 15 per cent of Singapore's 3.2 million people are Malay Muslims, 10 per cent are Indian and the balance is ethnic Chinese.