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.