A Ukrinform report alleges a major column -- including 120 Russian transporters, 30 tanks -- "came from the Russian border" and was spotted near Dubrovka, Ukraine. It reportedly took 40 minutes for the column to pass. There's related video at the bottom.
Reuters is quoting a Ukrainian military spokesman as saying new military equipment was seen entering Ukraine from Russia, including three Grad multiple-launch missile systems.
Here's the related message from the Ukrainian National Security and Defense Council:
In case you missed it, from BBC:
The new rebel leader in east Ukraine's Donetsk region has said his forces include 1,200 fighters who underwent military training in Russia.
Addressing a meeting, Alexander Zakharchenko said the fighters had trained "four months on the territory of the Russian Federation".
The rebels, he said, had reserves of 150 combat vehicles, including tanks.
An earlier mistranslation of his words suggested Mr Zakharchenko had said the vehicles were on their way from Russia.
Russia has denied claims by Ukraine and Western reporters that military aid to the rebels has been crossing the border.
Ukraine's foreign minister preparing for the Berlin talks with Russian, French, and German counterparts. They are scheduled to start in about seven hours.