Twenty-six alleged neo-Nazis are on trial in Germany on accusations they were responsible for a spate of attacks on leftists in western Germany.

Prosecutors say the men, aged 19 to 54, kept files on left-wing activists including addresses, license plate numbers and photographs. Starting in 2009 until their arrest in March, they are accused of attacks that included attempting to set fire to cars, throwing stones through windows and street fights.

They're also accused of spray-painting neo-Nazi graffiti, damaging 40 election campaign signs, and putting stickers reading "Rudolf Hess Street" in tribute to Hitler's deputy over street signs.

Charges in the trial that opened in Koblenz state court Tuesday include membership in a criminal organization, arson and robbery with potential penalties ranging up to 15 years in prison.