A series of bombings has rocked Irbil, the capital of Iraq's autonomous province of Kurdistan, killing six members of the security services.
Irbil is in a stable part of Iraq and the region has not witnessed such attacks in the past six years.
A central government spokesman said the violence could be linked to fighting between jihadists and Kurd in Syria.
Meanwhile, at least 25 people were killed when a suicide bomber attacked a Shia Muslim mosque south of Baghdad.
The blast is reported to have brought down the roof of the mosque in Mussayab, and bodies are feared to be trapped in the debris.
The attack took place as a funeral was under way for a man killed by militants a day earlier, said Reuters news agency.
Sectarian violence has surged across Iraq in recent months, reaching its highest level since 2008.
Both Sunni and Shia places of worship have been targeted in recent months.
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Irbil is in a stable part of Iraq and the region has not witnessed such attacks in the past six years.
A central government spokesman said the violence could be linked to fighting between jihadists and Kurd in Syria.
Meanwhile, at least 25 people were killed when a suicide bomber attacked a Shia Muslim mosque south of Baghdad.
The blast is reported to have brought down the roof of the mosque in Mussayab, and bodies are feared to be trapped in the debris.
The attack took place as a funeral was under way for a man killed by militants a day earlier, said Reuters news agency.
Sectarian violence has surged across Iraq in recent months, reaching its highest level since 2008.
Both Sunni and Shia places of worship have been targeted in recent months.
Read more