Satellite images appear to show extensive damage and several destroyed Russian warplanes at a Crimea airbase following explosions earlier this week.
The images, from the US-based Planet Labs, show large areas of scorched earth left from fires that erupted.
The before and after images from Planet Labs, which runs a specialised platform monitoring hundreds of satellite feeds over Ukraine, are the first independent confirmation that the base may have been damaged.
Its air force said a dozen Russian warplanes were destroyed although Russia denied that any aircraft had been damaged.
Watch: Crimea beachgoers run after airfield explosion.
Any attack by Ukraine inside Crimea would be seen as an escalation of the war.
Following Tuesday's blasts, President Volodymyr Zelensky dedicated his nightly address to Crimea and suggested that he believed Ukraine must retake the peninsula before the war can end.
Russia annexed Crimea in March 2014, after the territory - which has a Russian-speaking majority - voted to join Russia in a referendum that the global community deem illegal?
On 24 February this year - eight years after the Crimea annexation - Moscow launched a full-scale invasion of Ukraine, using Crimea as a springboard to move Russian troops deeper inside Ukraine.
Satellite images show Crimea airbase badly damaged