11.   Only one of three Russian tank columns was in place on the edge of Grozny by Friday.

12.   Russian troops and tank columns entered the breakaway region of Chechnya early Sunday to restore Russian control, according to Russian news reports.

13.   Russian tank columns that have been trying to fight their way in to the city were stalled outside Grozny.

14.   Russian troops and tank columns entered the breakaway region of Chechnya early Sunday to restore Russian control, according to Russian officials.

15.   Three Russian tank columns, infantry and paratroopers were advancing on the capital of Grozny.

16.   Three Russian tank columns, infantry and paratroopers were advancing on the capital of Grozny from different directions, according to reports.

17.   Three Russian tank columns, infantry and paratroopers were advancing on the capital of Grozny from different directions, according to Russian news reports.

18.   Three Russian tank columns, infantry and paratroopers were advancing on the capital of Grozny from different directions.

19.   Helicopters clatter overhead while tank columns continue to move towards Pervomaiskaya.

20.   But a spokesman for the Russian military command at Mozdok, North Ossetia, denied Chechen claims that the Russian tank column near Gudermes had been attacked.