Three Ontario men are being sought by the FBI on charges of conspiracy to commit federal crimes in the United States including the illegal sale of firearms and mail fraud.

The three were named in an Federal Bureau of Investigation operation that resulted in the shooting death of the leader of a radical Islamic group who allegedly preached violence against the government. Luqman Abdullah, 53, refused to surrender during an FBI raid near Detroit Wednesday and was shot and killed, police said.

Abdullah, also known as Christopher Thomas, and 10 others, including the Canadians, were named in a federal complaint unsealed Wednesday that alleges conspiracy to commit theft from interstate shipments, mail fraud to obtain the proceeds of arson, illegal possession and sale of firearms and tampering with motor-vehicle identification numbers.

The complaint says the 11 defendants are members of a group that is alleged to have engaged in violent activity over many years.

“In light of the information that the charged individuals were believed to be armed and dangerous, special safeguards were employed by law enforcement to secure the arrests without confrontation. During the arrests . . . the suspects were ordered to surrender. At one location, four suspects surrendered and were arrested without incident. Luqman Ameen Abdullah did not surrender and fired his weapon. An exchange of gunfire followed and Abdullah was killed. An FBI canine was also killed during the exchange,” the FBI said in a news statement.

The Canadians being sought in connection with the incident and facing charges of conspiracy to commit federal crimes are: Mujahid Carswell, 30, also known as Mujahid Abdullah; Mohammad Alsahi, 33, also known as Mohammad Palestine and Yassir Ali Khan, 30. It is unclear where in Ontario the suspects live.

According to the FBI, the man who was killed, Abdullah, was the local leader of the group which calls itself Ummah (the brotherhood) a group of “mostly African-American converts to Islam, which seeks to establish a separate Shariah-law governed state within the United States.”

The FBI says the Ummah is ruled by Jamil Abdullah Al-Amin, formerly known as H. Rap Brown, now in prison for the murder of two police officers in Georgia.

Once the investigation is complete, authorities will decide whether to seek a felony indictment on the charges.

Police in Windsor did not comment on the case Thursday morning.