A Turkish ferry and a Ukrainian-flagged cargo ship have collided off Istanbul, injuring at least 30 people, Turkish media report.
The ferry hit an anchored cargo ship
Ambulances rushed to the quayside after the crash in the Sea of Marmara. The ferry docked at Yenikapi pier.
Ferry company spokesman Tolga Uyar said that the injured passengers were not in a serious condition.
He added that most of those injured had hit their heads on seats or on other parts of the ferry.
Most passengers were suffering from shock, Mr Uyar said. It is not yet clear how many people the ferry - called Salih Reis-4 - was carrying at the time. Its capacity is 450 passengers.
The ferry had been travelling from Bostanci on the Anatolian side to the island of Avsa in the Sea of Marmara, Mr Uyar said.
One passenger interviewed by the private television channel NTV said "people at the front started screaming when they saw we were going to hit the ship".
"Then there was a big bang, and the windows smashed. We thought we were going to sink, so people started to panic. Some people were hurt when they hit their heads and things but I didn't see any serious injuries."
A coastguard spokesman said sea traffic through the Bosphorus Strait was unaffected.
Istanbul's sea buses and ferries transport about 300,000 passengers across the Bosphorus and Sea of Marmara daily.