Baghdad (CNN) -- At least 22 people were killed and more than 80 wounded Sunday in several car explosions and shootings in Iraq, including an attack on an Iraqi army base, authorities said. The war in Syria and sectarian tensions have played a part in the recent surge in violence in Iraq. The United Nations said 2013 was the deadliest year in Iraq since 2008, with almost 8,000 people killed, most of them civilians. Fears of all-out sectarian war have increased after violence that broke out in Anbar province in recent days. On Sunday, the most fatalities occurred when men with small firearms attacked the army base in Abu Ghraib west of Baghdad, police said.
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8 killed after attack on Iraqi army base
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Double bombing kills 4, wounds 26
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Journalist gunned down outside home in Mosul
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More than 20 people injured in two car bombings in Baghdad on Sunday
Earlier, at least one person was killed and 11 others wounded in a car bombing south of @placeholder.