Anti-government protests have swept through major cities and towns across Iran, and the authorities are responding with a harsh crackdown.
BBC Verify has been examining disturbing footage from a mortuary in Tehran, showing scores of bodies.
These images could hold crucial clues about what’s really happening inside Iran. Merlyn Thomas reports.
Produced by Alex Dackevych.
Verification by Richard Irvine-Brown, Shayan Sardarizadeh, Sherie Ryder and Benedict Garman.
Graphics by Mark Edwards.