A Border Patrol agent who had worked in the agency’s Tucson sector since 2006 died in the line of duty last week, officials said Thursday.

Anibal “Tony” A. Perez died on Nov. 5, said Border Patrol Chief Raul Ortiz.

A spokesman with U.S. Customs and Border Protection said Thursday he had no additional information.

The spokesman, John Mennell, also said he did not know where in the Tucson sector Perez served. Perez was a supervisory agent, according to Ortiz.

“The entire USBP family mourns the loss of Supervisory Border Patrol Agent Anibal “Tony” A. Perez who sadly passed away in the line of duty. Please keep his family, friends, and colleagues in your thoughts,” Ortiz announced on his Twitter page.

According to the CBP website, the Tucson sector runs from the New Mexico state line, west to the Yuma county line, encompassing 262 border miles. It includes nine border stations in Douglas, Willcox, Naco, Nogales, Ajo, Sonoita, Casa Grande, Three Points and Tucson.