A German tourist who was arrested with a Frenchman after their boat allegedly strayed into Iranian waters has been freed from prison in Teheran, Foreign Minister Frank-Walter Steinmeier said Monday. Donald Klein, a 52-year-old sculptor, was arrested by Iran along with Stephane Lherbier in November 2005 after entering Iran's territorial waters during a sailing trip off the coast of neighboring United Arab Emirates. The two were convicted in January 2006 and sentenced to 18 months in prison. Though Iran's Foreign Ministry at the time confirmed that they were tried and convicted, it gave no other details of their case. When Lherbier was released last month, however, the French Foreign Ministry said he had been convicted of taking photos of ships in the Persian Gulf.