"Any letup will encourage these groups to strike again."

They aren't organized so much that one group will strike or show force to help another, are they?

At the same time, groups friendly to the Bush campaign struck back.

It is hoped that these groups can strike an opponent without leading to full-scale war.

Small groups of teachers struck for as long as three months.

In the prospect hole, the group literally "struck it rich".

The group may have struck again Saturday night, when five sport utility vehicles had their tires slashed here.

The third group struck at the key logistical sites, military vehicles and the engineering company.

After a night retirement, the group conducted further strikes the next day.

The group mobilized for disaster relief after the magnitude-7 earthquake struck.