A suicide bomber has blown himself up in a cafe in a mainly Shia town north of Baghdad, killing at least 12 people, officials say.
More than 20 people were injured in the attack in Balad. There were also deadly bombings in Baghdad and elsewhere.
Earlier on Saturday, gunmen shot dead two journalists while they were filming for a local station, al-Sharqiya News, in the northern city of Mosul.
Iraq has seen a sharp rise in sectarian violence in recent months.
Late on Saturday, security officials reported a major explosion in Baghdad's Adhamiyah district.
AFP news agency reported that it had been caused by a bomb targeting Shia pilgrims that had left eight dead and more than 20 wounded.
In other violence, one person was reported to have been killed and three injured after a roadside bomb exploded in Muqdadiyah, north-east of Baghdad.
Meanwhile, the defence ministry said security forces had killed five militants in clashes in Baiji, and two more in the northern province of Nineveh.
The recent violence has led to fears of a return to the sectarian conflict that spiked in 2008 in Iraq. Almost 1,000 people were killed during last month alone, the UN has said.
Violence rose after an army raid on a Sunni Arab anti-government protest camp in April.