The heavy calibre shells and grenades whistled through the sky every few minutes and dug huge craters in the snowy fields along a front line that skirts a devastated village 10 kilometres (six miles) northwest of the eastern rebel stronghold Donetsk.
Blasts inside Tonenke itself -- abandoned by all but a handful of its 300 residents -- flattened buildings and mangled paved roads that stetch toward a disputed airport on the edge of Donetsk.
"The attacks start early in the morning and end deep into the night. There is a quiet spell of one or two hours at most. It has never been like this before."
The type of long-distance exchanges piercing the skies around the militants' capital today have caused hundreds of civilian casualties throughout the nine-month campaign.
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A long-range Grad rocket killed 12 people yesterday when it exploded near a commuter bus travelling toward Donetsk from a government-controlled city on Ukraine's southeast coast.
Ukrainian President Petro Poroshenko told the nation that yesterday's rocket was fired by rebels, while responsibility rested on "those who stand behind them -- those whose hand feeds them and arms them, drills them and inspires them to commit bloody crimes."
The transparent reference to Moscow -- charges which President Vladimir Putin rejects -- was followed by Kiev claims that the fighters employed a massive 30-barrel flamethrower, a type used by Russia but not Ukraine.
This type of system "only exists in the operational service of the Russian army. It is not operated by us," Ukrainian defence ministry spokeswoman Viktoria Kushnir said.