German authorities released a Lebanese man arrested in connection with a suspected plan to attack Iraqi Prime Minister Iyad Allawi during a visit to Berlin, the federal prosecutor's office said on Sunday. The man was arrested on Saturday on suspicion of supporting a terrorist organization but was later released, the spokesman said. Arrest orders were issued on Saturday for three other men held on Friday as suspected members of a militant group after indications the men were planning an attack on Allawi during his visit to Berlin last week. The orders mean that police can hold the men in custody while an investigation is carried out. The spokesman confirmed the names of the men as Rafik Y., a 30-year-old arrested in Berlin, Ata R., a 31-year-old arrested in Stuttgart and Masin H, 22, arrested in Augsburg. Allawi's visit to Berlin was curtailed after the suspected plot was uncovered, with a number of meetings cancelled.