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Protest at Iran soccer game about Saudi involvement in Bahrain quashed by police

RAHEB HOMAVANDI / Reuters

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

An Iranian spectator (C) wearing a shirt with picture of founder of the Islamic Republic Ayatollah Ruhollah Khomeini shouts to oppose the presence of Saudi Arabian troops in Bahrain during the AFC Champions League soccer match between Iran's Persepolis and Saudi Arabia's Al-Ittihad at Tehran's Azadi stadium May 3, 2011.

BEHROUZ MEHRI / AFP - Getty Images

Iranian riot police confront militia Basij hardliners at the AFC Champions League group C match between Iran's Persepolis and Saudi's Al-Ittihad at the Azadi stadium in Tehran on May 3, 2011. Some 300 hardliners protested at the stadium against Saudi's policies

BEHROUZ MEHRI / AFP - Getty Images

An Iranian riot policeman beats a militia Basij hardliner during the AFC Champions League group C match between Iran's Persepolis and Saudi's Al-Ittihad at the Azadi stadium in Tehran on May 3, 2011. Some 300 hardliners protested at the stadium against Saudi's policies on Bahrain where Shiite Muslim Bahrainis took to the streets of the kingdom in February and March calling for reform.

Vahid Salemi / AP

Iranian police officers push away protesters.

There's a lot to understand about the situation in Bahrain that gave rise to these protests in Iran. Here's an article about Iran and Saudi Arabia's interests in Bahrain, and another article about detention of Shiites in Bahrain. And from today, an article on msnbc.com about Bahrain trying doctors for treating injured protesters.