Saturday, September 18, 1999 Published at 12:52 GMT 13:52 UK
Russian push against rebels
High security in the wake of the Moscow bombs
Russian aircraft attacked guerrilla bases in the breakaway Caucasian republic of Chechnya on Friday night, as Russia tightened its internal security after a series of bomb blasts.
On Friday, the Russian parliament endorsed plans to continue air strikes against Chechen rebel bases.
Independent sources in Moscow have dismissed earlier reports that Russian military vehicles had crossed into Chechnya.
The Chechen chief-of-staff in Grozny earlier told Interfax news agency that motorised units had ventured about 1.5km (one mile) into Chechnya.
FBI heads for Moscow
An FBI team is on its way to Russia to assist in the investigation.
In the past 10 days, bombs have destroyed two blocks of flats in Moscow and badly damaged another in the southern town of Volgodonsk, killing a total of more than 300 people.
The FBI officials may also be able to help ascertain whether an explosion in a flat in St Petersburg on Thursday night was related to the other bombings.
Stop and search
Russian police have been conducting identity checks, apparently concentrating on people whose appearance suggests Caucasian origins.
More than 10,000 people were reported to have been stopped and searched or questioned on Friday.
Thousands of traders from Azerbaijan who live in Moscow on temporary residence permits now have to re-register, or risk deportation.
But Russian civilians have already begun organising regular patrols to search for suspicious packages and to question strangers.
Moscow blames the rebels for the blasts, an accusation denied by the Chechen authorities.
The Chechen authorities have accused Russia of aggression, saying recent Russian air raids have claimed more than 200 lives.
"Russian war planes have been making night-time air strikes on sleeping women, children and old men," Chechen Vice-President Vakha Arsanov said.