( CNN ) -- Authorities in the Mexican north-central state of Durango have confirmed the discovery of 26 bodies in a mass grave . According to the Durango State 's Attorney 's Office , the bodies were found in a residential area in the capital city of the same name . Officials say the bodies found late Wednesday were already badly decomposed and so far they have n't been able to identify the victims . The bodies were found in a lot apparently belonging to an auto shop located in the residential area known as `` Las Fuentes . '' According to local media reports , four other bodies were found on April 11 , but the Durango State Attorney 's Office did not immediately confirm that information . Crime scene pictures obtained by the Diario Contexto de Durango newspaper after the bodies had been removed show shallow mass graves right next to a brick wall . The area had already been cordoned off by authorities . The grisly discovery comes in the same week that authorities in Tamaulipas , a Mexican state that shares a border with Texas , confirmed they have so far found 116 bodies in multiple mass graves . Fifty-nine bodies were originally found on April 6 in eight mass graves in the town of San Fernando , located 90 miles south of Brownsville , Texas . As the investigation widened , authorities kept on finding more bodies , some in groups of several dozen . Sixteen San Fernando police officers were arrested last week for allegedly protecting those responsible for the mass graves that had been uncovered , according to the Mexican attorney general 's office . Martin Omar Estrada Luna , an alleged drug kingpin nicknamed `` El Kilo , '' was captured last Saturday in connection with the mass graves . According to officials , Estrada is a presumed leader of Los Zetas . The Mexican drug cartel has operated for years in the area of San Fernando . The investigation in Tamaulipas began after reports of bus passengers in northeastern Mexico being forcibly removed from buses and taken away by heavily armed men . Another 72 bodies were found in San Fernando last August . They were identified as the remains of Central and South American immigrants on their way to the United States . Another presumed member of Los Zetas identified as Jose Manuel Garcia Soto was arrested earlier this month as a suspect in the death of U.S. Immigration and Customs Enforcement Agent Jaime Zapata . Zapata and his partner were ambushed in the state of San Luis Potosi while traveling from the northern city of Monterrey to Mexico City . His partner survived .
Mexican authorities uncovered a mass grave in the north-central state of Durango . Twenty-six badly decomposed bodies were found . Authorities have not been able to identify the victims . Authorities in Tamaulipas had said they had found 116 bodies in multiple graves .