UK deployed military to deter Russian submarines from its waters

On 9 April 2026, the United Kingdom said it deployed its military to deter Russian submarines from its waters. The UK said the submarines targeted undersea cables, and the defence secretary said three Russian submarines targeted UK cables. BBC World reported that the UK said Russia ran a submarine operation over cables and pipelines, and NDTV wrote that the UK and Norway led the operation. TASS separately carried a Russian claim that Ukraine is planning attacks on Russian ships in northern seas with Norway's help.