Hong Kong (CNN) -- China has launched a terrorism crackdown one day after a series of explosions in an open-air market killed dozens in the western Chinese region of Xinjiang, the country's state news agency, Xinhua said Friday. Without any details, the report said authorities had undertaken a "one-year crackdown on violent terrorist activities" in the volatile region after blasts in the heavily policed city of Urumqi killed at least 39 people and wounded more than 90, according to state media. The number of dead does not include the attackers. The state news agency reported Friday that five attackers were responsible for the blasts; four were killed in the explosions, and a fifth was arrested Thursday. They were identified through DNA testing, Xinhua said.
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State news agency: China begins "one-year crackdown on violent terrorist activities"
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The report offers no details of the crackdown, but authorities tighten security at entry ports
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Thursday's explosions killed at least 39 people and wounded more than 90, state media say
Two SUVs slammed into shoppers gathered at the market in @placeholder at 7:50 a.m. Thursday, and explosives were flung out of the vehicles, Xinhua said.