US officials have satellite images that they claim show Russia firing missiles more than 11 kilometers inside the territory of eastern Ukraine.
On Sunday, the US State Department released images showing where the rockets came from and the craters they made.
The State Department said the images were obtained from the director of US intelligence.
The four-page document is said to show the attacks between July 21 and July 26.
Lavrov and Kerry for a ceasefire in Ukraine
Russian Foreign Minister Sergei Lavrov and US Secretary of State John Kerry agreed on the need to establish an immediate ceasefire in eastern Ukraine.
In a press release from the Ministry of Foreign Affairs of Russia, the crisis in Ukraine was described as an "internal conflict".
Washington and the West accuse Moscow of supporting pro-Russian forces fighting the Ukrainian army in eastern Ukraine, Reuters reported.
Wounded Polish journalist
A Polish journalist, who works for the Ukrainian television station "Espresso TV", was seriously wounded in the clashes in the east of Ukraine, the Polish MSP announced today.
The announcement states that Bjanka Zalevska, who managed to get in touch with the Polish Ministry of Foreign Affairs, was wounded.
As reported by the Itar-Tass agency, she was transferred to a hospital in Kharkiv.
Zalevska was wounded yesterday near the town of Starobelsk in the Lugansk region.
She was in a car with other members of the TV crew when the vehicle was shot at.
Attack on Gorlovka, at least 13 dead
At least 13 civilians, including two children, were killed today in a rocket and mortar attack by the Ukrainian army on the center of the city of Gorlovka in eastern Ukraine.
It is estimated that between 20 and 30 people died, while the number of wounded is unknown, local media in Donetsk reported, as reported by Itar-Tass.
"According to initial information, 13 people died, among them one child aged one and one aged five," the statement of the regional administration states.
Earlier, the spokesman of the Ukrainian army reported that rockets were being fired at residential areas of Gorlivka, which he accused the rebels of.
The Ukrainian army is still shelling the southern parts of Donetsk today, which has become a new crisis hotspot on the map of the city, Donetsk officials told RIA Novosti.
The fighting between Ukrainian and pro-Russian forces was previously mainly fought on the northwestern outskirts of Donetsk, the Voice of Russia reported.
The "Grad" rockets mostly fell on cafes and residential buildings, and there is still no information on the wounded and dead.
An air threat alert was also heard in Luhansk, and that city is preparing for a new air attack.
Artillery fire was heard today even one kilometer from the crash site of the Malaysian plane in eastern Ukraine under the control of pro-Russian fighters, France Press reported from the scene.
AFP adds that thick smoke can be seen and that some locals are fleeing. A nearby checkpoint of pro-Russian activists has been abandoned.
On the other hand, international investigators have canceled their trip to the plane crash site because of the conflict, said a representative of the Organization for Security and Cooperation in Europe (OSCE) mission on the spot. On Friday, 19 people were killed and 60 injured in attacks by Ukrainian forces on towns in the east of the country, which are under the control of pro-Russian forces.
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