The economic damage from Ukraine's attack on Russia's mainly agricultural Kursk region is estimated at almost $1 billion, with more than 150,000 people evacuated since the start of the incursion, the regional governor said on Wednesday.

The attack also prompted the authorities to temporarily shut down three airports just outside Moscow — Vnukovo, Domodedovo and Zhukovsky.

Russia has put SIM cards in its Shahed-136 drones this year and mounted antennae on their wings, the expert wrote in a report.

The delivery of Iranian missiles to Russia has changed the debate about Ukraine using Western-provided long-range missiles against targets inside Russia, UK Foreign Secretary David Lammy has told the BBC on a visit to Kyiv. Lammy travelled to the Ukrainian capital with US Secretary of State Antony Blinken after talks in London.

The United States has formally accused Iran of supplying short-range ballistic missiles to Russia for its war in Ukraine and will take measures to punish those involved.