More than 100,000 people marched in Tehran on Monday in support of reformist presidential candidate, Mir Hussein Mousavi  and his demands for an annulment of the election results that declared incumbent President Mahmoud Ahmadinejad  the winner of the election on June 12. The march ended in bloodshed. At least 7 people lost  their lives.
According to a report on Britain's Channel 4 television,  (aired in spite of a foreign reporting ban) a crowd threw rocks and set fire to a building that belonged to the pro-government Basij  militia. A helmeted militiaman on the roof fired his AK-47 rifle into the air before retreating from a shower of stones. On YouTube there is more citizen video of how this attack happened:
The morning after this shooting, the staff of Rasool Akram Hospital in Tehran demonstrated against the killings. One demonstrator holds a placard that says: “8 martyrs”
Shootings or repression have not stopped the protest movement, and thousands marched again in Tehran on Tuesday. Demonstrations are growing in other cities too. In Shiraz , protesters shown in this video burned President Mahmoud Ahmadinejad's photo.