Suspected Sunni Muslim militants killed at least 30 people around Iraq on Thursday including 12 soldiers in an assault on a remote army base in the north, deepening insecurity with a national election just two weeks away.

Sectarian bloodshed has increased since the Shi’ite Muslim-led Baghdad government began an offensive against insurgents, some of them affiliated with al Qaeda, dug in around Falluja and Ramadi in the western province of Anbar.

Early on Thursday morning, gunmen disguised in Iraqi military uniforms drove armored vehicles, including Iraqi army Humvees, up to a small military base outside Mosul and opened fire, killing 12 soldiers and wounding about a dozen, army and police officers said on condition of anonymity. […]