For acts of war:
An Iranian naval vessel fired on the rig owned by Romania's Grup Servicii Petroliere (GSP) in the Salman field and took control of its radio room at about 7:00 a.m. local time, Lulu Tabanesku, Grup's representative in the United Arab Emirates said in a phone interview from Dubai today.
I can't imagine that this isn't intentional provocation. Iran is sizing up Romania to be its Studetenland. With Romanians calling for the government to " 'undertake all diplomatic measures necessary' to persuade the Iranians to release the rig," look for Iran to continue to flex. They're just seeing how far they can go right now.