The United States, in coordination with the European Union and Canada, Friday slapped new sanctions on more than a dozen officials and businesses in response to Russia’s ‘continued aggression in Ukraine.’

Six Russian officials, six defence firms and two energy and construction firms were targeted, either over the seizure of Ukrainian vessels in the Kerch Straight, or for their activities in Russian-annexed Crimea or separatist eastern Ukraine, a US Treasury statement said.

‘The United States and our transatlantic partners will not allow Russia’s continued aggression against Ukraine to go unchecked,’ treasury secretary Steve Mnuchin was quoted as saying.

The US sanctions freeze all property and interests in property belonging to the designated individuals and entities, and prohibit US persons from transacting with them.

Four of the individuals are border guard or coast guard officials, singled out for their role in a November 25, 2018 naval confrontation, in which Russian ships fired on and seized three Ukrainian vessels in the narrow Kerch Strait the two countries share.

The four were targeted jointly with the EU and Canada according to the state department.

Twenty-four Ukrainian crew members were detained in the naval incident.

‘We call upon Russia to immediately return to Ukraine the seized vessels and detained crewmembers, and keep the Kerch Strait and the Sea of Azov open to ships transiting to and from Ukrainian ports,’ added state department spokesman Robert Palladino in a statement.

‘We also call on Russia to respect Ukraine’s sovereignty and territorial integrity within its internationally recognized borders, including its territorial waters.’

The United States additionally imposed sanctions on two Ukrainian separatists - Aleksey Naydenko and Vladimir Vysotsky - involved in organising November elections in the breakaway east, which Washington says were a ‘sham.’

The six defence firms were targeted over their operations in Russian-annexed Crimea, where the United States says several ‘misappropriated Ukrainian state assets to provide services to the Russian military.’

Among them are Russian shipbuilding giant Zelenodolsk, the hydroacoustic equipment producer Okeanpribor, a diesel engine supplier to the Russian military, Zvezda, and an electronic parts supplier to the military, Fiolent.

Meanwhile, Russia on Saturday slammed the ‘hypocrisy’ of new Western sanctions against its officials over their role in a naval confrontation with Ukraine last year, and vowed to respond to the ‘unfriendly’ move.

‘The pretext for including our countrymen in the illegitimate sanctions list of the EU astounds with hypocrisy and cynicism,’ the Russian foreign ministry said.