We were concerned by the reports and are in touch with the Egyptian government to ascertain the facts.
Our senior officials responsible for the regions concerned have met or have had a conference call today.
We are deeply concerned about the continued erosion of Sri Lanka's four-year-old ceasefire as marked by the recent series of violent incidents.
You've heard from members of Congress their distress at the developments in Egypt. If I were an Egyptian, or an Egyptian government official, I'd be concerned at the kind of reaction that these latest actions will get ... regarding the (U.S-Egyptian) relationship.
The United States remains particularly concerned by the Maoist insurgency, which presents the most immediate threat to a peaceful and prosperous Nepal.
The US is deeply concerned by reports that Charles Taylor fled.