BEIRUT, Lebanon — A day after violent protests rocked cities across Iran, the authorities arrested at least a dozen opposition figures on Monday, including former Foreign Minister Ibrahim Yazdi, the human rights activist Emad Baghi and three top aides to the former presidential candidate Mir Hussein Moussavi, Iranian news sites reported.
All told, more than 1,500 people have been arrested nationwide since Sunday, including 1,110 in Tehran and 400 in the central Iranian city of Isfahan, the pro-opposition Jaras Web site reported.
In Hawaii, where he is on vacation, President Obama condemned the violence against protesters and called for the release of those “unjustly detained.”
“For months, the Iranian people have sought nothing more than to exercise their universal rights,” Mr. Obama told reporters. “Each time they have done so, they have been met with the iron fist of brutality, even on solemn occasions and holy days.”
He added that the protests in Iran had nothing to do with the United States or other foreign countries. “It’s about the Iranian people, and their aspirations for justice, and a better life for themselves,” he said. “And the decision of Iran’s leaders to govern through fear and tyranny will not succeed in making those aspirations go away.”
The streets of Tehran were largely quiet on Monday, as citizens absorbed the shock of the previous day’s violence. Thirteen people were reported to have been killed and many more wounded in street battles in cities across the country between security forces and protesters, who fought back more fiercely than ever before. The government said Monday that eight people had been killed in Tehran, and opposition Web sites catalogued five deaths in other cities.
The government said that it was holding the bodies of five protesters, including a nephew of Mr. Moussavi, the state-run IRNA news agency reported, in what appeared to be an attempt to prevent funerals that could turn into more demonstrations. The bodies were being held pending autopsies.
The authorities’ use of deadly force on the Ashura holiday drew a fierce rebuke on Monday from the opposition cleric and reformist candidate Mehdi Karroubi, who noted that even the shah had honored the holiday’s ban on violence.
“What has happened to this religious system that it orders the killing of innocent people during the holy day of Ashura?” Mr. Karroubi said in a statement, according to the Jaras Web site.
Mr. Karroubi, a fierce critic of the government, was attacked Sunday by plainclothes security officers, and other attackers later smashed the front windshield of his car, the Sahamnews Web site reported.
Government supporters blamed opposition members for the violence and called for their prosecution. The Revolutionary Guards issued a statement calling violence by the protesters a “horrible insult to Ashura” and called for “firm punishment of those behind this obvious insult,” the semiofficial Fars news agency reported.
Large groups of police officers stood guard in several central Tehran squares on Monday morning, witnesses said. At least three subway stations were closed, apparently to prevent any further gatherings.
Still, there were reports of continuing scattered protests on Monday in Tehran’s Haft-e-Tir square and other areas, Jaras reported.
The police fired tear gas to disperse a group of mourners who gathered outside the Tehran hospital where the body of Mr. Moussavi’s nephew, Ali Moussavi, had been held, the Nowrooz Web site reported. A prominent opposition figure with ties to the Moussavi family said Ali Moussavi had been killed by assassins.
Family members said Mr. Moussavi’s body disappeared from the hospital overnight, and on Monday IRNA reported that his body and four others were being held while investigations were carried out.
A 27-year-old journalist who was reporting on the street clashes on Sunday was reported missing. The reporter, Redha al-Basha, who was working for Dubai TV, has not been heard from, according to a statement issued by Dubai TV. Mr. Basha was last seen surrounded by security forces in Tehran, witnesses said.
The group Human Rights Activists in Iran said that the 1,100 people arrested in Tehran were being held in Evin Prison, the Gooya Web site reported.
Among those arrested in Isfahan was the son of a senior cleric, Ayatollah Jalaleddin Taheri. Ayatollah Taheri is the former Isfahan representative of Iran’s supreme leader, Ayatollah Ali Khamenei, and his son Muhammad is married to the granddaughter of Ayatollah Ruhollah Khomeini, the father of Iran’s 1979 revolution.
Ayatollah Taheri tried last week to lead a memorial service for the dissident cleric Grand Ayatollah Hossein Ali Montazeri, who died Dec. 20. The arrest of his son was viewed as an effort by the authorities to pressure the ayatollah.