At least 20 people died Wednesday, including eight Shi'ite pilgrims, in three bomb attacks to the north and west of Baghdad, police spokesmen told Efe.
In the deadliest attack, which occurred in the town of al-Alam in Salahudin province, 10 people were killed and three were wounded in a car-bomb explosion.
Among the fatalities were three police officers.
The explosion of three bombs in Baquba, a city 65 kilometers (40 miles) northeast of Baghdad, took the lives of eight Shi'ites and wounded 15.
The pilgrims were taking part in the observation of Achura, one of the most important Shi'ite festivals, which celebrates its biggest day this Thursday.
Achura commemorates the martyrdom in Kerbala in the year 680 A.D. of Imam Hussein, grandson of the prophet Mohammed and the most important imam for the Shi'ite sect.
Two civilians also perished and seven suffered injuries from the explosion of two explosive devices in homes of the Garma neighborhood, east of Fallujah.
According to figures of the U.N. mission in Iraq - UNAMI - and the Iraqi government, close to 1,000 Iraqis died in violent acts during the month of October, one of the deadliest months of the past five years. EFE