Russian President Dmitri Medvedev fired Moscow police chief Vladimir Pronin Tuesday, after one of his officers killed three people and wounded six in a shooting spree. Medvedev earlier Tuesday suspended several senior officers in the precinct where the shootings occurred, saying the local police should take full responsibility, Medvedev spokeswoman Natalia Timakova said. The head of police in the Zarizyno district of southern Moscow killed his driver and then started firing indiscriminately in the street and in a supermarket, killing a cashier and a customer. Police arrested the recently-promoted officer, a major, who they said had had a domestic argument before he went on Sunday night's killing spree.