Here's today's map of the military situation in eastern Ukraine, according to Ukraine's National Security and Defense Council:
AP is quoting SBU chief Nalivaychenko as saying the men driving the Russian trucks are actually Russian military servicemen trained to drive combat vehicles, and that the empty trucks will be used to take out the bodies of separatist fighters.
The first trucks from a convoy which Russia says is carrying humanitarian aid have entered eastern Ukraine after a week waiting for permission to cross the border. Moscow has accused the Ukrainian government of creating "artificial demands" to delay aid deliveries. The convoy is bound for the Luhansk region, where many residents have been without fresh water and regular power supplies.
More from our news desk on Ukraine's response to the convoy entering its territory:
A senior Ukrainian security official has accused Russia of invading Ukraine after a humanitarian aid convoy entered the country without a Red Cross escort.
Dozens of trucks entered eastern Ukraine on August 22 after Moscow said it was tired of waiting and accused Kyiv of creating artificial delays.
Ukrainian military spokesman Andriy Lysenko said 90 trucks had entered Ukraine without agreement or participation of the Red Cross, in violation of agreements between Ukraine and Russia.
Ukraine's State Security Service chief, Valentyn Nalivaychenko, said the trucks' movement represents a "direct invasion" of Ukraine by Russia.
The Red Cross tweeted that it was not escorting the trucks due to the "volatile security situation."
Ukraine had voiced concerns the convoy could be used to supply the rebels with weapons.
AP seems to have backtracked on earlier report that the trucks were driven by Red Cross workers.
BREAKING: The head of Ukraine's State Security Service, Valentin Nalivaychenko, says the movement of Russian trucks into Ukrainian territory represents a "direct invasion" of Ukraine by Russia.