Authorities are investigating a series of attacks on Detroit-area Muslims, including an assault on a cleric who was hit with a shovel and reports that a group of youths threw shoes at worshippers in a mosque. The FBI is involved in the case, and Gov. Jennifer Granholm has offered state aid if needed, The Detroit News reported in its Thursday editions. On Sunday, a group of youths entered Al-Islah Islamic Center in Hamtramck and took shoes that worshippers had left by the door, then threw them at the congregants, mosque officials said. Officials also said mosque windows had been broken twice this year. Full Story