JIM LEHRER: The political pressure built in Iran today, as thousands of people rallied to support the government. Protesters also turned out again, insisting the presidential election was stolen.
And the country's supreme leader, Ayatollah Ali Khamenei, agreed to a partial review of ballots. He also appealed for unity, and he said, "In the elections, voters had different tendencies, but they equally believe in the ruling system and support the Islamic republic."
Lindsey Hilsum of Independent Television News begins our lead story coverage.
LINDSEY HILSUM: Reclaiming the streets. President Ahmadinejad's supporters massed in central Tehran today. The pictures were shown on state television.
Foreign journalists have been banned from filming. This is a country where you take such restrictions seriously.
The opposition were also out. Fearing clashes with Mr. Ahmadinejad's followers or attacks by the police, opposition leaders, including the presidential candidate, Mir Hossein Mousavi, had advised their people to stay at home.
Last night's violence has shocked many. It's now a little clearer what happened. The government says seven people were killed and 29 injured.
Opposition supporters I've spoken to believe the clashes were provoked by government agents, but today several leading reformists were arrested, accused of orchestrating violence.
GHOLAM-HOSSEIN MOHSENI EJEI, intelligence minister (through translator): More than 25 to 26 of the provocative agents behind the recent unrest have been arrested, and I am telling the rest of them that their actions are not secret from the intelligence minister. If from now on they take to the streets during the night and cause problems for people and the country, they will not only be arrested, but their identities will be made public.