Two explosions ripped through Russia’s main natural gas-supply pipeline to Armenia and Georgia on Sunday, halting supplies at a time of freezing temperatures and sparking accusations of sabotage from Georgian President Mikhael Saakashvili. Officials said it could take up to four days to repair the damage.

More than 60 people were killed on Thursday, including about 50 militants, after gunmen launched attacks on Russian government installations in the southern city of Nalchik, the region’s top official said. Arsen Kanokov said the attacks were carried out by about 150 armed militants.