Russia’s navy used its Bastion coastal missile defense system to practice firing at targets in the Black Sea off the coast of seized Crimea, the Russian Defense Ministry said on Thursday, as Ukraine staged joint military drills with the US.

The drills in Ukraine, which will include US and other NATO forces, are scheduled to go until October 1. They come after the West was spooked by massive war drills held by neighbors Russia and Belarus earlier this month.

After Russia took the Crimean peninsula from Ukraine and backed pro-Russian rebels in Ukraine’s Donbass area, Kyiv’s ties with Moscow deteriorated in 2014. Over 13,000 people have died in the seven-year war with separatists.

Russia’s Black Sea Fleet practiced detecting and destroying sea targets with its Bastion system, an advanced mobile anti-ship and surface-to-surface defense system, the Defense Ministry said in a statement.

Defence Minister Sergei Shoigu has said the Bastion system can hit sea targets at a distance of 350 km (219 miles) and land targets at a distance of 450 km (281 miles).