Ukraine sinks Russian submarine and targets airfield as long-range strikes surge

A Ukrainian soldier watches a drone feed from an underground command centre in Bakhmut, Donetsk region (Libkos/AP)

Ukraine has sunk a Russian submarine and hit a Russian airfield in the past 24 hours, in line with a surge of long-range attacks against Russian targets, officials said.

Russia said Ukrainian drones also hit an apartment building, killing one person.