1.   Police said they had no immediate clues.

2.   Computers can already monitor immediate clues such as blood pressure, heart rate, respiration and sweat-gland activity.

3.   The unusual symbols are the only immediate clue that this is a holy place.

4.   There were few immediate clues.

5.   Police said they had no immediate clue about who planted the bomb or their possible motive.

6.   Authorities said there was no immediate clue why the balcony collapsed under the weight of the six.

7.   Authorities said they had no immediate clue why the truck apparently went out of control.

8.   Officials in the Russian-backed Chechen administration are widely despised by separatist Chechens, although there was no immediate clue as to the identity of the attackers.

9.   Police had no immediate clues about the identity of the saboteurs.