(CNN) — Istanbul’s new transcontinental train tunnel under the Bosphorus Strait had a bumpy first day of operation, a day after Turkey’s Prime Minister called it a “project for whole humanity” at an inaugural ceremony. | On Wednesday, Turkey’s state railway confirmed reports there had been a power outage in the tunnel system. | “Emergency situation procedures” were also carried out multiple times, the agency said in a statement posted online, because passengers hit emergency buttons aboard the trains.
Read More: Snags reported on first day of Bosphorus Strait train tunnel operation