21.   Tying up seven guards in the back of the van, the robbers then forced refinery workers to take them to a high-risk area of the mine.

22.   Police broke up a demonstration by oil refinery workers in the Iranian capital on Sunday, detaining a large number of people, witnesses said.

23.   Police on Sunday broke a demonstration by oil refinery workers in the Iranian capital, detaining a large number of people, witnesses said.

24.   Police broke up a mass demonstration by oil refinery workers in the Iranian capital on Sunday, detaining a large number of people, witnesses said.

25.   Police on Sunday broke up a demonstration by oil refinery workers in the Iranian capital, detaining a large number of people, witnesses said.