Seven police officers have died after gunmen attacked a convoy carrying three alleged kidnappers arrested in northern Mexico, officials have said.
Two of the suspects were freed in the raid which took place about 48km (30 miles) south of the city of Zacatecas.
Two police officers escorting the detainees were also wounded when the gunmen opened fire in Friday's attack.
The third suspect, who did not escape, is being questioned in Mexico City, the federal attorney general's office says.
According to officials, the seven dead officers were six local police and a traffic officer.
The three alleged kidnappers had been arrested earlier in the day when police stopped a lorry bearing Texas licence plates.
A kidnap victim was rescued and a fourth suspect killed during that incident.