German police have arrested a man on suspicion of being an accomplice to a suspect arrested in Austria two days ago over plotting a terrorist attack.

Special police units arrested the man and during a raid on an apartment in the western city of Neuss yesterday, a spokesman for the Criminal Investigation Office (LKA) said.

The man has been charged with planning to carry out a "serious act of violent subversion," said Frank Scheulen, spokesman for the LKA in the state of North Rhine-Westphalia.

The suspect arrested in Vienna two days ago had been a guest at the Neuss home of the suspected accomplice, said the Dusseldorf prosecutor's office.


The two suspects had discussed attacks against German military targets, the prosecutor's office said.

According to media site Focus online, the Neuss suspect is thought to have been considering a bomb attack within Germany against police and soldiers.

The site quotes investigators as saying that he has confessed to having close contact with suspect in Vienna, and that both experimented with methods of producing explosive materials in his flat.

- Reuters, AAP