1.   Five existing ones would be improved and a new one built in Asia to help alert the force of interceptor missiles of enemy attack.

2.   Some ground units, such as the Navy personnel fired upon by US helicopters, often lack the technical ability to alert other forces of their presence.

3.   The lead forces were alerted earlier this week to be prepared to move on urgent notice and were reportedly positioned early Thursday to mobilize on command.

4.   The scouts knew the tactics of the Viet Cong and North Vietnamese, so they could alert our forces to potential ambush sites or booby-traps.

5.   Government forces have been alerted to a possible major attack by Tamil rebels in northern Jaffna Peninsula, a state-run newspaper reported Sunday.

6.   He said Albanian security forces had been alerted to the possibility of infiltration.

7.   Neighbors said they alerted security forces after they hears gunfire and grenade blasts, but that soldiers arrived too late.

8.   Neighbors said they alerted security forces after they heard gunfire and grenade blasts, but that soldiers arrived too late.

9.   Security forces were alerted to the carnage by a driver who forced his way through the road block, papers said.

10.   The government said that security forces were alerted and sent in troops who managed to kill several attackers.