Three-way summit ends in Istanbul, Rubio: Murders must be stopped

At the meeting held by Rubio has met with Ukraine's Defence Minister Andri Yermak, Ukrainian Foreign Minister Andri Syhbiza and Turkish counterpart Hakan Fidan.

Meanwhile, Ruby's spokeswoman, Tammy Bruce, has indicated that discussions between the three delegations have focused on the importance of reaching a peaceful solution to the war in Ukraine.

CNN also reported that a special meeting was held between US State Department official Michael Anton and Russian representative Vladimir Medinsky.