BAGHDAD - Sunni insurgents clashed with troops and briefly occupied a town in northern Iraq on Friday night, the latest development in an escalating turf war with the Shi'ite-led government that has killed at least 21 people in the past two days, police said.

Dozens of militants in SUVs drove into the small town of al-Sainiyah near Baiji, some 180 km (112 miles) north of Baghdad, after bombing the local police headquarters and fought troops for several hours overnight, witnesses said on Saturday.

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