By Moscow correspondent Scott Bevan
Russia's Interior Ministry has announced that military operations have been re-introduced in three districts of Chechnya.
The RIA Novosti newsagency says the operations have been relaunched because of what the ministry calls "activity among illegal armed groups".
Last week, Russia officially ended its decade-long counter-terrorism operation in its southern republic, saying its forces had defeated separatist rebels and that stability was being restored to Chechnya.
But outbursts of violence and attacks continue. Earlier this week, three Russian soldiers were killed by gunmen.