The Islamic State group's self-styled "caliphate" across parts of Iraq and Syria seemed largely defeated last year, with the loss of its territory, the killing of its founder in a U.S. raid and an unprecedented crackdown on its social media propaganda machine.

Iraqi security forces fired tear gas and live rounds during clashes with anti-government protesters overnight and on Monday morning in Baghdad, wounding at least 13 demonstrators and prompting authorities to close key streets and thoroughfares leading to the city center, officials said.