Mexican authorities say they have found the remains of 33 people buried at a home in the Ciudad Juarez area, which borders the southwestern U.S. state of Texas.
Officials said Friday they believe the victims were killed by members of Mexico's Juarez drug cartel, which operates in the area.
Ciudad Juarez has drawn attention in recent years due to a series of murders of women that have largely gone unsolved. Many of those victims were sexually assaulted.
Mexican authorities also say seven people were killed Thursday in a law office in the western city of Guadalajara, in what appeared to be another round in a string of recent drug-related slayings.
The law firm - Rangel Garcia and Associates - has high profile drug smugglers among its clients, including Joaquin Guzman, head of the Sinaloa cartel.
Mexican newspapers report that some of the victims were found tied up and shot execution style.
Since taking office more than a year ago, Mexican President Felipe Calderon has launched a nationwide campaign to crack down on gangs and drug-related violence.
Some information for this report provided by AP and Reuters.