Observers special monitoring mission of the OSCE in Eastern Ukraine on Tuesday came under fire, said the head of the OSCE Ivica Dacic. "The SMM observers were again fired in the East of Ukraine ", - said in a statement. Dacic has noticed that " the security and freedom of movement is extremely important for SMM to carry out its mandate ". "I am again very quickly condemn any incidents or actions that create obstacles to the work of the SMM. Security of the property of the SMM must be fully respected, " added the head of the OSCE in connection with the recent arson attack in Donetsk 4-car observers. Dacic said that the current escalation of violence in the Donbas is contrary to the spirit of the Minsk agreements, and again tried to convince the sides to observe the truce. On Tuesday, the OSCE mission again mentioned about the noticeable increase in violations of the ceasefire that took place yesterday on the East and North of Mariupol.