• Almanza Morales, killed in the attack, was accused of working for the Zetas, drug traffickers who also serve as enforcers for the Mexican Gulf cartel, and of killing army Brig. Gen. Juan Arturo Esparza and his four bodyguards in a November attack.

Esparza was killed shortly after he was named police chief in the Monterrey suburb of Garcia. Five Garcia police officers were among 10 people arrested in Esparza’s killing.

Nuevo Leon state Attorney General Alejandra Garza y Garza said in Monterrey that a second shootout that left five people dead ensued when gunmen in at least 10 Sport Utility Vehicles heading to the villa, presumably to rescue those detained, ran into a military convoy.

• During that shootout, one of the gunmen’s cars burst into flames. Three people inside died, Garza y Garza said. Television images showed three charred bodies, two of them with their hands tied behind their backs.

• Garza y Garza said the driver was a drug trafficker and the other two apparently were drug dealers who had been kidnapped. A fourth body was found about 165 feet (50 meters) from the burning vehicle. A woman who was driving near the shootout was killed by a stray bullet and two other bystanders were wounded, he said.

Seven people were arrested during the second clash, Garza y Garza said.

• Hours after the shootouts, gunmen suspected of working for the Zetas attacked a detention center in Monterrey suburb of Escobedo, killing two federal police officers guarding it and freeing 23 inmates, 15 of them members of a kidnapping gang working for the Zetas and the eight others were suspects detained in robbery investigations, he said.