At least 132 inmates escaped from the prison in Piedras Negras, a border city in northern Mexico, using a tunnel, Coahuila state Public Safety Secretary Jorge Luis Moran said.

Coahuila officials have asked the United States for assistance in finding and capturing the inmates, who broke out of the prison on Monday, Moran said.

The warden of the Piedras Negras prison, 27 guards, a shift supervisor and a security chief were detained after the escape, Coahuila government spokesman Sergio Sisbeles told Efe.

Of the prisoners who escaped, 86 were being held on federal charges and the rest were common criminals, Sisbeles said.

The state government is offering a reward of 200,000 pesos ($15,600) for information leading to the capture of each of the prisoners, the Coahuila government spokesman said.