Attacks mostly targeting Sunni Arab areas of Baghdad as well as northern and western Iraq killed at least 23 people on Tuesday, the latest in a months-long surge in bloodletting.

The rise in violence, which has killed more than 6,200 people this year, has prompted the authorities to appeal for international help in combating militancy ahead of general elections due in April.

Officials have blamed a resurgent al-Qaida emboldened by the civil war raging in neighboring Syria, but the government has itself faced criticism for not doing enough to address the concerns of Iraq’s disaffected Sunni Arab minority. […]