EISA is represented by offices in the key ports of the Black Sea and Azov Sea
, the Russian Baltic Sea and Mediterranean.
The area of our positions being shelled has increased," Ukrainian military spokesman Andriy Lysenko said in a televised briefing, referring to the government-held industrial hub on the Azov Sea
The port city of Mariupol - which lies on the Azov Sea
and is between mainland Russia and the Russia-annexed Crimean Peninsula - was targeted.
Crimea has no land corridor to Russia, and relies on a ferry in the Azov Sea
and flights from Russia.
He said pro-Moscow separatists have been increasingly active in southern Donetsk region, where seven civilians died this week on the outskirts of government-controlled city of Mariupol on the Azov Sea
Battlefield defeats Kiev signed up to the deal after the rebels -- apparently with Russian military backing -- swept across the southeast towards the Azov Sea
, delivering a series of battlefield defeats to government.
Poroshenko promised to shake up Ukraine's military leadership as government forces lost ground and allowed pro-Russian militants to open a new southern front by seizing Novoazovsk, an Azov Sea
coast border town in the south-eastern corner of Ukraine.
Pro-Moscow forces claimed responsibility for an attack on a Ukrainian naval cutter in the Azov Sea
, off the eastern port Mariupol.
29 took Novoazovsk on the Azov Sea
and the road linking Russia to Crimea, after six-day shelling, far from most battles with Kiev troops.
Hours later, Ukraine said a border guard vessel operating in the Azov Sea
was attacked by land-based forces.
The town of Novoazovsk lies in a strategically significant location - on the Azov Sea
and on the road linking Russia to the Russian-annexed Crimean Peninsula.
Novoazovsk lies on the Azov Sea
on the road that runs from Russia to the major Ukrainian port of Mariupol and west to Crimea, the Black Sea peninsula annexed by Russia.