President Hassan Rouhani on Monday at the ceremony of signing documents of the 4th summit of the Caspian Sea littoral States, while appreciating the successful holding of the meeting, said that the fact that in a day four joint document have signed by the Caspian Sea Littoral states shows the countries’ will to cooperate on Caspian issues. The president said today at the summit heads of all the littoral states want to announce that their will is that the sea, as always be a sea of friendship, peace, security and cooperation. President Rouhani said that we should avoid militarization of Caspian Sea and unilateral measures.