News of the massive attack comes as Russian President Vladimir Putin holds talks with US envoys Steve Witkoff and Jared Kushner in Moscow Ukraine has been targeting key oil facilities deep inside Russia in recent months to financially harm Vladimir Putin's country. Key points and original sources are listed below.

• News of the massive attack comes as Russian President Vladimir Putin holds talks with US envoys Steve Witkoff and Jared Kushner in MoscowS1

• Ukraine has been targeting key oil facilities deep inside Russia in recent months to financially harm Vladimir Putin's country.S2