The Army is investigating his activities at the camp, military officials said.

The government announced that it would begin investigating their activities.

You will continue to investigate criminal activity, and probably to act upon it.

Time use research investigates human activity inside and outside the paid economy.

I fancy it would be interesting to investigate his financial activities.

The guidelines established what the police are allowed to do to investigate political activity.

He is a reporter investigating suspicious activity at the hospital.

You saw exactly what anybody investigating their activities was supposed to see.

Winter drops the man as an employer, having investigated his activities.

Eventually, authorities from multiple agencies began to investigate the group's activities.