Moscow has been shaken by a second deadly explosion in days, intensifying security concerns in the Russian capital. Russian authorities say two traffic police officers and a civilian were killed when an explosive device detonated as officers approached a suspicious individual near a patrol vehicle. The blast occurred close to the site where senior Russian general Fanil Sarvarov was killed earlier this week in a car bombing. Investigators have opened a criminal case and are probing possible links between the attacks. Russia has previously accused Ukraine of involvement in similar bombings, though Kyiv has not confirmed or denied responsibility. Authorities say investigations are ongoing.