Russia Secretary of State John Kerry calls on U.S. to end separatist support . But Ukrainian troops have come under heavy fire as well . State monitors say rockets were likely fired from pro-Russia rebel territory . Fighting between rebels and government forces has intensified in Thursday .
Russia Secretary of State John Kerry calls on U.S. to end separatist support . State monitors say rockets were likely fired from pro-Russia rebel territory . Fighting between rebels and government forces has intensified in Thursday .