Updated

Authorities say Fresno's deputy police chief is among four people arrested on federal drug charges, including conspiracy to distribute oxycodone and heroin.

The Fresno Bee reports (http://bit.ly/1EZhkZN ) that Deputy Police Chief Keith Foster has been put on administrative leave.

Federal authorities say the 51-year-old was arrested Thursday as result of a yearlong joint investigation by the FBI and ATF that involved wiretaps and surveillance.

Officials also arrested Fresno residents Rafael Guzman, Jennifer Donebedian and Randy Flores.

The 29-year-veteran oversaw patrol operations for the department's four police districts.

Neither the FBI nor the Fresno Police Department could provide the name of a defense attorney to comment on the charges.

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Information from: The Fresno Bee, http://www.fresnobee.com