Growing numbers of dead dolphins are washing up on shore following the collision of two Russian oil tankers in the Kerch Strait between the Black and Azov Seas, according to ecologists.

The Russian Ministry of Defence confirmed in a statement on Sunday that Ukrainian forces launched new attacks amid their incursion into Russia that began with a surprise assault in August.

Meanwhile, Russian elites are concerned with Vladimir Putin's efforts to wage a full-scale war in Ukraine. Submit your questions for our correspondents in the box below.

Defence Secretary John Healey (Stefan Rousseau/PA) The UK will lead an operation to track potential threats to undersea infrastructure and monitor the Russian shadow fleet, Defence Secretary John ...

[Photo/Xinhua] VIENNA - On a frosty morning in Slovakia's capital Bratislava, cameraman Peter Lahky expressed his concerns over a looming energy crisis after Ukraine on Wednesday halted Russian ...

Turning up to negotiations with Ukraine still holding on to Russian territory, even small parcels, will weaken Putin. Pro-Russian social media channels showed screenshots of Ukrainian forces ...

By John Ismay The attack ... By Valerie Hopkins and Nanna Heitmann Ukrainian forces’ assault was in the Russian region where they made a surprise incursion last summer. By Marc Santora ...

A renegade part of Moldova once boasted it would become a Russian-speaking Switzerland. Now without gas, its leader assured residents, “We will not allow a societal collapse.” By Andrew ...