TAIPEI—A weeklong standoff between Taiwan's government and protesters over a trade pact with China showed no signs of easing Monday, after antiriot police used water cannons to evict protesters from the cabinet compound and student groups urged the public to stage an island-wide strike.

While most protesters were unarmed and resisted peacefully, a small group entered the Executive Yuan building by breaking windows. They ransacked several offices, destroying office equipment and furniture, before clearing out.

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