Bombs ripped through outdoor markets in and near Baghdad on Thursday, killing at least 21 people and wounding dozens, the latest in a deadly wave that has hit Iraq in recent months, officials said.

A new wave of insurgent attacks, mostly car bombs targeting Shiite-dominated cities in central and southern Iraq, killed at least 35 people on Sunday, officials said.

Attacks in Iraq killed nine people including three police Tuesday, while militants bombed a major pipeline carrying oil to Turkey, halting exports, officials said.

Violence killed around 1,000 people in July, government and United Nations figures show, making it Iraq’s deadliest month since 2008 when the country was emerging from a bloody sectarian conflict.

Evening attacks against Shiites in Iraq killed at least 24 people and wounded 49, Iraqi officials said on Friday, in the latest attempt by insurgents to exacerbate the country’s renewed sectarian tensions.

A bombing on Baghdad’s southern outskirts killed seven people Wednesday, the latest in a three-day wave of bloodshed targeting Shiite Muslims that has left 113 dead amid fears Iraq is slipping back into all-out sectarian war.

Attacks north of Baghdad have left 41 dead as the UN said more than 2,500 were killed in the past three months, highlighting concerns that Iraq is slipping back into all-out war.

Iraqi officials say a bomb has gone off in an outdoor market in west Baghdad, one of two attacks in Sunni-majority parts of the country that have left seven dead.

Iraqi officials say a car bomb in a Shiite suburb of Baghdad has killed four people and wounded 12 others. Two police officers say the parked car bomb went off early morning today in Hussainya and killed four civilians.

US secretary of state John Kerry is in Iraq on an unannounced visit to urge Iraqi leaders to stop Iranian overflights of arms and fighters heading to Syria and to overcome sectarian differences that still threaten Iraqi stability 10 years after the American-led invasion that toppled Saddam Hussein.