Bucha (dpa/th) - A motorcyclist was seriously injured in an accident on Autobahn 4 in the Saale-Holzland district. The biker was traveling in the direction of Frankfurt on Friday and collided with a car near the municipality of Bucha, the police said. A rescue helicopter was said to be in action. The autobahn was temporarily blocked in the direction of Frankfurt, and the Lodeburg tunnel near Jena was closed due to the traffic jam.