The bodies of seven members of a family were found over the weekend inside a house in the eastern Mexican state of Veracruz, police said.
The bodies were discovered Sunday at the house in Manlio Fabio Altamirano, a city in the southern part of Veracruz.
Several women and children were among the victims, whose throats were cut.
Police went to the house after neighbors reported smelling a foul odor coming from the property, the Veracruz Attorney General's Office said.
The bodies were decomposing, indicating that the victims had been dead for at least 72 hours, the AG's office said.
Investigators do not have any leads or a motive for the killings, the AG's office said.
Veracruz has been plagued by a turf war between rival drug cartels that has sent the state's murder rate skyrocketing over the past two years.
The federal government launched "Operation Safe Veracruz" last October in an effort to stem the wave of drug-related violence in the Gulf state.
On June 12, police found the remains of 14 people stuffed into an abandoned SUV on the Alamo-Potrero del Llano state highway near Los Cuates, a ranch in northern Veracruz close to the border with Tamaulipas.
The Gulf, Los Zetas and Jalisco Nueva Generacion cartels, as well as breakaway members of the once-powerful La Familia Michoacana organization, are fueling the violence in the state.
Veracruz, Mexico's third-most populous state, is coveted as a key drug-trafficking corridor to the United States, officials say. EFE