article_snippet: Meanwhile a sixth man thought to be involved in Russian opposition leader Boris Nemtsov death blew a sixth man up  after being approached by police at a sixth man apartment block, Interfax said.
article_snippet: The 30-year-old reportedly threw a grenade at officers in Grozny, Chechnya, on Saturday night before setting one off near a sixth man.
highlights_snippet: Meanwhile a sixth man thought to be involved blew a sixth man up with a grenade after being approached by police .