Seven people were shot and killed today at a Sikh temple in Oak Creek, Wis., in what officials are treating as a case of domestic terrorism.
Though police have not given any details on the identity or motive of the shooter, or released the identities of the victims, sources have told ABC News the shootings are the work of a "white supremacist" or "skinhead."
This evening, the FBI and a bomb squad arrived at a home in Cudahy, Wis., near Oak Creek, and ABC News Milwaukee affiliate WISN reported the action appeared to be related to the temple shootings earlier in the day.
Authorities also were trying to trace a single, semiautomatic handgun recovered at the scene, sources told ABC News.
In addition to the seven confirmed dead, three people -- two adult male civilians and a male police officer -- were in critical condition and were being treated at a local hospital, said officials at Froedtert & The Medical College of Wisconsin.
The apparent gunman was shot and killed in an exchange of gunfire with the wounded police officer outside the temple and was one of the seven dead.