BEIJING (AP) — China announced Monday that it has arrested more than 200 terror suspects over the past month in the restive Xinjiang region, highlighting its commitment to a security crackdown even as a bloody attack last week raised questions about its effectiveness.

Since the attack, which killed 43 people in a vegetable market in the regional capital of Urumqi, Beijing has responded with a show of force in the form of police and troops parading down city streets, an announcement of a one-year crackdown on terrorism, and creation of ad hoc anti-terror work teams around the country. But some observers say the strategy — no matter how toughly it is implemented — is ineffective and could even backfire.