Russia says one of its warships fired warning shots at a Turkish fishing vessel in the Aegean Sea to avoid a collision.

A Russian defence ministry statement said the Turkish vessel approached to 600m (1,800ft) before turning away in response to Russian small arms fire.

The Turkish military attache in Moscow has been summoned to the foreign ministry over the incident.

Relations remain tense over Turkey’s shooting down of a Russian bomber.

The Russian SU-24 bomber was shot down by two Turkish F-16s in the Turkish border-Syria area on 24 November.

Turkey maintained the plane crossed into its airspace, although Russia disputes this.