According to the correspondent, artillery strikes hit Donetsk on Tuesday evening and continued throughout the night. Several residential areas have been affected by the shelling, but there is no information on casualties among the civilian population.
On Tuesday, the Organization for Security and Co-Operation in Europe (OSCE) said in a statement that the situation near the Donetsk airport has deteriorated and more civilian casualties have been reported "elsewhere".
The Chief Monitor of the OSCE Special Monitoring Mission to Ukraine, Ambassador Ertugrul Apakan, encouraged all sides to the Ukrainian conflict to enhance the implementation of the Minsk agreements, according to the statement.
Kiev signed a ceasefire agreement with representatives of the self-proclaimed people's republics of Donetsk and Luhansk (DPR and LPR) in Minsk on September 5. The meeting of the Contact Group on Ukraine was also attended by OSCE and Russian representatives.
Another meeting, held by the Contact Group on September 19, resulted in the signing of a memorandum, specifying the implementation of the ceasefire.
Despite the agreements, both Kiev and independence fighters have accused each other of violating the truce.
According to the UN humanitarian agency OCHA, over 4,800 people have been killed in Ukraine since Kiev launched a military operation against independence supporters in the Donetsk and Luhansk regions last spring.