Officials say the former treasurer of the state of Tabasco has been arrested on the U.S. border in an embezzlement investigation after nearly $7 million in cash was found in his office.

A Mexican official speaking on condition of anonymity said Jose Saiz was detained Saturday after he attempted to cross from the city of Reynosa, across the border from McAllen, Texas.

Saiz's attorney, Xavier Olea, confirmed the arrest in comments to Mexican media. Calls to Olea's office went unanswered Sunday.

State prosecutors said last month they found 88.5 million pesos in an office used by Saiz, who served under former Gov. Andres Granier. The state's current governor has accused his predecessor of embezzling millions, claims strengthened by reports of extravagant spending by Granier and his inner circle.