German police on Wednesday arrested a man accused of planning a vehicle-based terrorist attack in the southwestern city of Karlsruhe, DW reported.

The 29-year-old German citizen, identified only as Dasbar W., had alleged connections to the "Islamic State" group.

Investigators said he planned to ram a vehicle into the stands around a city center ice rink. He had allegedly been applying for jobs as a delivery driver for the past two months but was unsuccessful. He allegedly scouted out the location in August.

The Federal Prosecutor General said the ice rank plans posed a grave threat to the state.

He was also accused of disseminating propaganda videos for IS and promoting its ideology via Whatsapp group chats.

Separately, a man was extradited from France to Germany on Wednesday on suspicion of being a member of the Taliban.