The U.S. government delegates law enforcement authority to federal agencies, many of which have a presence in Michigan, such as the Federal Bureau of Investigation, the Drug Enforcement Administration, the Bureau of Alcohol, Tobacco, Firearms and Explosives, the U.S. Transportation Security Administration, U.S. Customs and Border Patrol, U.S. Forest Service and the National Guard. Federal law enforcement officers have jurisdiction over incidents that involve violations of federal law or that occurred on federally owned property or land. They may also work on local issues at the request of a local department or agency.