请总结以上文本，要求使用第三人称，总结到3句话以内，并且必须保留出现次数最多的信息。Police officers seized large quantities of narcotics from multiple locations across the city during a large-scale raid. The operation involved over 200 officers and resulted in the arrest of 30 suspected drug dealers. The raid, which lasted for 12 hours, covered several key areas in the city, including downtown and several suburban neighborhoods.
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在一场持续12小时的大规模行动中，警方在全市多个地点查获了大量毒品，此次行动涉及超过200名警员，并导致30名疑似毒品贩子被捕。行动覆盖了市中心及多个郊区社区。
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