ON-DON, RUSSIA, JULY 8, SPA -- UNKNOWN ASSAILANTS ATTACKED TWO VEHICLES IN TWO TROUBLED SOUTHERN RUSSIAN PROVINCES AND BLEW UP A THIRD CAR, KILLING SIX PEOPLE AND INJURING SEVEN OTHERS, POLICE OFFICIALS SAID SATURDAY. A CAR CARRYING A GROUP OF FISHERMEN IN CHECHNYA'S NORTHEASTERN SHELKOVSKY DISTRICT CAME UNDER AUTOMATIC GUNFIRE ON FRIDAY, LEAVING FOUR PEOPLE KILLED AND TWO SERIOUSLY WOUNDED, A SPOKESMAN FOR CHECHNYA'S INTERIOR MINISTRY SAID. THE TWO OR THREE ASSAILANTS ESCAPED, THE SPOKESMAN SAID. ALSO ON FRIDAY, A MINIVAN CARRYING POLICE IN CHECHNYA'S CENTRAL SHALINSKY DISTRICT EXPLODED WHEN IT HIT A REMOTE-CONTROLLED ROADSIDE BOMB, INJURING THREE SECURITY OFFICERS AND A TRAFFIC POLICEMAN, THE SPOKESMAN SAID. IN THE NEIGHBORING PROVINCE OF INGUSHETIA, ANOTHER CAR WAS RIDDLED WITH GUN FIRE BY UNKNOWN ASSAILANTS AS IT WAS DRIVING IN THE CENTRAL SUNZHENSKY DISTRICT, KILLING THE DRIVER AND A MILITARY SERVICEMAN, AND LEAVING ANOTHER SOLDIER WOUNDED, THE SPOKESMAN SAID. THE ATTACKERS ESCAPED, THE SPOKESMAN WAS QUOTED AS SAYING BY THE ASSOCIATED PRESS.