Things just escalated notably - (Via Bloomberg):

Reuters reports,

Separately, a Ukrainian military spokesman said Ukrainian forces had tracked the Russian armoured column as soon as it crossed onto Ukrainian soil."Appropriate actions were undertaken and a part of it no longer exists," military spokesman Andriy Lysenko told journalists.

Ukrainian artillery destroyed a "significant" part of a Russian armoured column that crossed into Ukraine during the night, President Petro Poroshenko told British Prime Minister David Cameron on Friday, according to the presidential website.

We await Putin's response...

EU & US Stocks and bond yields (and Ruble) are tumbling, gold rising.

Of course we noted this last night...

As The Guardian reports,

While the white trucks came to a halt well short of Ukraine's border, a different Russian convoy did cross into Ukrainian territory late on Thursday evening.

The Guardian saw a column of 23 armoured personnel carriers, supported by fuel trucks and other logistics vehicles with official Russian military plates, travelling towards the border near the Russian town of Donetsk.

After pausing by the side of the road until nightfall, the convoy crossed into Ukrainian territory, using a rough dirt track and clearly crossing through a gap in a barbed wire fence that demarcates the border. Armed men were visible in the gloom by the border fence as the column moved into Ukraine.

Kiev has lost control of its side of the border in this area.

The trucks are unlikely to represent a full-scale official Russian invasion, and it was unclear how far they planned to travel inside Ukrainian territory and how long they would stay. But it was incontrovertible evidence of what Ukraine has long claimed – that Russian troops are active inside its borders.

...

The armoured column seen by the Guardian appeared to be further evidence of Russia's incursions, which the Kremlin has repeatedly denied.

Read more here...