Baghdad, Iraq (CNN) -- At least 36 people were killed and 100 others were wounded when three explosions struck central Basra, police officials said Sunday.
Investigators have offered conflicting explanations for the blasts, which struck a large power generator in a busy market Saturday.
Basra Police Chief Gen. Adel Daham said it was unclear whether the explosion was a terrorist attack or the result of an electrical spark or malfunction.
Other police officials had a different account of the power generator blast, tying it directly to a bomb. Conflicting reports on incidents are common in Iraq.
Meanwhile, in central Iraq, two civilians were killed and three others were wounded Sunday morning when a car bomb exploded in northeastern Falluja, police said.
A 5-year-old girl was among the wounded.
In a separate attack, gunmen opened fire on a car in central Falluja and critically wounded the driver, police said.
The attacks were the latest in a string of violence in and around the Sunni town about 60 km (37 miles) west of Baghdad in Anbar province.
On Saturday, several bombs exploded at the home of a local leader with the Awakening Council in Garma, killing his son and wounding two other family members, according to police.
That day several bombs also exploded at the house of a police officer, wounding four members of his family, in Garma -- located 7 km (4.3 miles) outside Falluja.
In Amriyat al-Falluja, about 15 km (9.3 miles) west of Falluja, gunmen opened fire at a police checkpoint Saturday, killing one policeman and wounding three others.