Baghdad ( CNN ) -- A series of explosions rocked Baghdad on Thursday morning , killing at least 31 people and leaving more than 50 others injured , Iraq 's interior ministry said . In a separate incident in Kirkuk , two car bombs exploded , killing four people and injuring 23 others , including six police officers . The violence may continue a pattern of outbreaks following lulls . March had the lowest monthly death toll since the U.S-led invasion in 2003 , officials said earlier this month . According to interior ministry figures , 112 people died violently in March : 78 civilians , 12 Iraqi soldiers and 22 police officers . Until then , the lowest monthly death toll was in November 2009 , when the country recorded 122 deaths . Figures have fluctuated in Iraq month to month , with lulls in violence followed immediately by an uptick . In March , Iraq hosted an Arab League summit , a gathering that signaled the political emergence of post-war democratic Iraq . Security forces blanketed the capital in unprecedented security , and the gathering was a test of Iraq 's ability to provide critical organization and security in the country where deadly violence remains a weekly norm . Journalist Mohammed Lazim contributed to this report .
At least 31 are killed in Iraq 's capital . The blasts follow a month that had a record low number of violent deaths .