Federal prosecutors said Thursday they are taking charge of the investigating into a shooting in the German city of Hanau that left 11 people dead, including the suspect, amid reports that he may have had a far-right motive.

The Federal Prosecutors Office in Karlsruhe, which handles serious crimes, said it planned to hold a news conference later Thursday.

German news agency dpa reports that police are examining a video the suspect may have posted online several days earlier in which he details a conspiracy theory about child abuse in the United States. The authenticity of the video couldn't immediately be verified.

Nine people were killed at two hookah bars overnight. Police later said they found the suspected shooter and another person dead at a house not far from the second bar.

A spokesman for Hanau prosecutors, Markus Jung, confirmed the death toll but declined to comment on the reported video, or provide details of the suspect or victims. "We don't believe there were further attackers," Jung told The Associated Press.