Unidentified man was serving 3-year prison sentence for 'taking photos and videos' in unauthorized places; exchanged for Iranian wanted by US for violating sanctions

Frank-Walter Steinmeier had decided to not congratulate Tehran on anniversary, but embassy accidentally sent out draft of message said to be 'very critical'

Translator and his wife accused of passing classified information to Tehran after tip-off from 'a friendly secret service'

Chief says force is showing 'patience,' Germany urges Iranian authorities to allow demonstrators 'to express their opinions' over downing of airliner

Security services review threat levels following killing of Iranian Gen. Qassem Soleimani in Iraq; several states reported to raise alert levels

Iranian Foreign Minister Zarif meets with German counterpart in Tehran, calls for end to US 'economic war' on his country; says Trump peace plan is 'crime against Middle East'

German Foreign Minister Heiko Maas to visit Tehran, followed by Japanese Prime Minister Shinzo Abe in attempt to dial down tension and salvage nuclear deal

Leaders express concern at Tehran's threat to step up enrichment, while hoping Iranian president is chiefly seeking to show strength domestically