Iraqis have begun burying more than 200 victims from Thursday's car bombs and rocket attacks in Baghdad's Shi'ite district of Sadr City.
Iraqi Prime Minister Nouri al-Maliki ordered police to guard funeral processions, as the victims' caskets were taken from the capital to the Shi'ite holy city of Najaf.
Iraqi Vice President Tariq al-Hashimi, a Sunni Arab, made a joint televised appeal for calm with President Jalal Talabani, a Kurd, and Shi'ite leader Abdul Aziz al-Hakim.
Thursday's attack was the deadliest since the Iraq war began in 2003.
More than 250 people also were wounded, and doctors say many of them are in critical condition.
Baghdad is under a 24-hour curfew to prevent further sectarian violence, but mortar attacks were reported in Sunni neighborhoods of the city Friday.
Elsewhere, authorities say a suicide bombing killed at least 22 people in the northern city of Tal Afar. And British authorities say a British soldier died after being shot during a search and detention operation in Basra.
Separately, the U.S. military in Iraq says coalition forces killed four insurgents and detained six others during a raid Friday on a suspected bomb-making cell in the town of Tarmiyah, just north of Baghdad.
Some information for this report was provided by AFP, AP and Reuters.