AT LEAST 81 PEOPLE HAVE BEEN KILLED AND 79 WOUNDED IN FOUR DAYS IN A WAVE OF ATTACKS BY GANGSTERS IN THE BRAZILIAN STATE OF SAO PAULO, SECURITY OFFICIALS SAID ON MONDAY, ACCORDING TO REUTERS. THE DEAD INCLUDED 31 POLICEMEN, EIGHT PRISON GUARDS AND FOUR CIVILIANS. THE OTHERS WERE SUSPECTED GUNMEN KILLED BY POLICE.