Acts 17:5, 13

But some others became jealous. So they got some evil men from the marketplace, formed a mob, and started a riot. They ran to Jason’s house, looking for Paul and Silas, wanting to bring them out to the people.

But the people in Thessalonica learned that Paul was preaching the word of God in Berea, too. So they came there, upsetting the people and making trouble.