NEW YORK - The FBI shot and killed a man who was described as a leader of a radical group while eight men were arrested in Wednesdays raids in Detroit, according to media reports. Luqman Ameen Abdullah, 53, refused to surrender and fired a gun when the FBI raided a Dearborn warehouse, the FBI and the US attorneys office for the Eastern District of Michigan claimed in a joint statement. He was killed when agents returned fire, they added. Abdullah, also known as Christopher Thomas, and 10 others were charged in a complaint with conspiracy to commit felonies, including illegal possession and sale of firearms and theft from interstate shipments. The 11 defendants are members of a group that is alleged to have engaged in violent activity over a period of many years and known to be armed, the statement said. Those arrested are members of Ummah, a group made up mostly of African-American converts to Islam who seek to create an Islamic state within the United States, federal officials alleged. Seven of the men appeared in US District Court Wednesday, and another was in custody. Two had yet to be caught. The raids took place at least two locations, the Dearborn warehouse and a home in Detroit, authorities said. Federal authorities said Ummah is ruled by Jamil Abdullah al-Amin, the 1960s radical born as Hubert Gerold Brown and formerly known as H. Rap Brown, who is serving a life sentence for shooting two police officers in Georgia in 2000. Brown was once chairman of the Student Non-violent Coordinating Committee and justice minister of the Black Panther Party.