A new BBC investigation has revealed the scale of operations by a shadowy Russian mercenary group in Libya's civil war, which includes links to war crimes and the Russian military.
A Samsung tablet left by a fighter for the Wagner group exposes its key role - as well as traceable fighter codenames.
And the BBC has a "shopping list" for state-of-the-art military equipment which expert witnesses say could only have come from Russian army supplies.
Russia denies any links to Wagner.
The group was first identified in 2014 when it was backing pro-Russian separatists in the conflict in eastern Ukraine. Since then, it has been involved in regions including Syria, Mozambique, Sudan, and the Central African Republic.
Wagner's fighters appeared in Libya in April 2019 when they joined the forces of a rebel general, Khalifa Haftar, after he launched an attack on the UN-backed government in the capital, Tripoli. The conflict ended in a ceasefire in October 2020.