And now it appears as if most of the deadliest attacks are happening in the province north of Baghdad, Diyala province.
For example, the Sunnis that are being pushed out of Baghdad into Anbar province.
Petraeus told The Washington Post on Sunday that the increase in U.S. and Iraqi troops since February has yielded a more secure Baghdad and Anbar province as well as a lull in sectarian violence.
Baquba is north of Baghdad, in Diyala province, which borders Iran.
Sunni lawmaker Mohammed al-Khaldi from the opposition Iraqiya bloc said he received complaints from voters in Baghdad and in Diyala province about missing names on voting rolls as well.
Those events came a day after eight U.S. soldiers died in two separate bombings in Baghdad and in Diyala province, and a leading sheikh in a Diyala province town was killed by a female suicide attacker, officials said.
CNN: In one day, bombings, battles and shooting kill 48 in Iraq
We're going to take this conversation over the break, so if you have a question for General Keane about the situation in Baghdad and the rest of Iraq as we're, what, about seven weeks into the escalation of forces into Baghdad and to Anbar province as well.
Abu Ghraib is a predominantly Sunni area about 20 miles west of Baghdad and near the Anbar province.
Half of those arrested were captured during raids in Samarra, in Salaheddin province north of Baghdad, according to the military.
Sunni Endowment leader Ahmed Abdul Ghafur al-Samarrai told the AP that the killers originated from Iraq's volatile province west of Baghdad.
U.S. and Iraqi troops have been fighting insurgents in Operation Arrowhead Ripper in and around Baquba, the capital of Diyala -- the eastern province northeast of Baghdad.
The convoy was heading from Baiji -- the site of Iraq's largest oil refinery -- to Ramadi, in Iraq's volatile Anbar province west of Baghdad, the police official said.
BAGHDAD, Iraq (CNN) -- Voters in Diyala province -- the district north of Baghdad with a majority Sunni Arab population -- are backing the country's draft constitution, according to early figures released from last week's referendum on the law.
Other troops were killed in northern Iraq and Anbar province, west of Baghdad.
The attack took place on a U.S. patrol base at an Iraqi school near the town of Baquba in Diyala province, northeast of Baghdad.
The Americans have also had some success in Anbar province, west of Baghdad, where a new Anbar Salvation Council of Sunni tribal sheikhs is leading a campaign against al-Qaeda, which may have overreached itself in the area.
Saturday's results showed Mr Maliki's State of Law coalition won crucial votes in Baghdad and the oil-rich Basra province.
Elsewhere, notably in the Sunni-inhabited Anbar province to the west of Baghdad, the scale of violence continues to decline.
Other operations are in Anbar province, to the west of Baghdad, and in hotspots south of the capital.
Authorities in the province of Babil, south of Baghdad, enforced a curfew.
Joseph Biden, D-Delaware, said he saw no evidence of sectarian amity when he was recently in Anbar province, which is west of Baghdad.
CNN: Iraq is now the central front on the war on terror, general says
Tribal leaders in Iraq's largest province, Anbar, west of Baghdad, which is overwhelmingly Sunni, outmanoeuvred one of their own who had aspirations for national office, Sheikh Ahmed Abu Risha.
She said there was a sense of jubilation in Anbar province, the Sunni heartland west of Baghdad.
Some of the extra troops might be used to secure Baghdad, while others could be sent to Anbar province, according to Pentagon correspondent Tom Bowman.
Already, tens of thousands of Shiites have fled Anbar Province, many to Shiite neighborhoods in Baghdad, while Sunnis have been forced from their homes in Shiite communities.
There are operations in al-Anbar province to the west, which used to be a Sunni stronghold, several operations in and around Baghdad, and a lot of focus has been put on Baqouba, that's the capital city of Diyala province.
Baquba, the largest city in Diyala province, is about 60 kilometers (37 miles) north of Baghdad.
BAGHDAD, Iraq (CNN) -- Gunmen in a northern Iraq province have been given 10 days to turn in their weapons to avoid jail time and get a monetary reward.
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