Istanbul Port Authority

Istanbul Strait was closed to shipping traffic both ways on July 21 due to an intercontinental swimming competition, according to Istanbul Port Authority.

Turkish authorities have closed Istanbul's Bosphorus Strait on Thursday for rescuing a teenager who went missing one month ago, according to Xinhua News. 

The Istanbul Port Authority announced that the two-way traffic in the region had been shut down at 8:45 a.m. local time (0545 GMT) for the underwater search and rescue activities.