11.   Others said two Russian helicopters had been shot down by the militants.

12.   Russian helicopter gunships and artillery have launched raids against a large group of gunmen in Chechnya.

13.   Russian helicopters patrol the neighboring fields.

14.   Shortly after Yeltsin spoke, five Russian helicopters attacked a Chechen village, Serzhen-Yurt, firing rockets into farmhouses, Reuters reported.

15.   The gunfire, marked by heavier explosions, continued an hour later, as Russian military helicopters flew overhead.

16.   The hostage drama stalled here when the retreating convoy of rebels and hostages came under fire from Russian helicopter gunships.

17.   The lowing of cattle in the muddy field behind the large house Magomadov built is broken by the steady chopping whir of Russian helicopters and the whine of jets.

18.   The rebels on Friday released a four-man Russian helicopter crew and two passengers who had been detained Tuesday in eastern Sierra Leone.

19.   Wednesday, Russian helicopters flew over the village and threatened over loudspeakers to bomb it unless the captives were released.

20.   Wednesday, the rebels shot down a Russian helicopter and damaged three others, the military said.