Russia and Ukraine have been stepping up strikes on cargo vessels for several weeks

Turkish officials on Tuesday said a drone attack on two civilian vessels in the Black Sea had left crew members injured.

The foreign ministry said the ships were attacked after leaving the Russian port of Novorossiysk late on Monday and several personnel were wounded, adding that “their situation is being closely monitored”.

“We are deeply concerned about the escalating conflict between Russia and Ukraine in the Black Sea, which is affecting civilian shipping despite our numerous warnings,” the ministry said.

It called on all parties to “urgently implement concrete measures to ensure the safety of navigation in the Black Sea” and warned that food supplies could be affected otherwise.