PASADENA >> A high-ranking Pasadena police officer was put on paid administrative leave Thursday after the Bureau of Alcohol, Tobacco, Firearms and Explosives searched his home.

City officials would not disclose details about the investigation or the officer’s identity. However, the individual is not represented by the Pasadena Police Officers’ Association, according to the union’s president.

The union covers rank-and-file officers and sergeants, but not upper management. Pasadena police commanders, lieutenants and the police chief are all unrepresented.

No arrests or charges were filed as of Friday afternoon.

Police Chief Phillip Sanchez was notified of the ATF’s investigation Wednesday night. The officer’s home was raided the following morning.

Video obtained by KCBS2 showed agents moving several large cases from the officer’s garage into SUVs parked in front of his home.

Kimberly Usher, a spokeswoman for ATF, declined to comment on the search because of the ongoing investigation.

Pasadena spokesman William Boyer said the ATF’s probe did not appear to center on “anything involving the officer’s work with the department.”

“The individual officer cooperated fully with ATF agents as they executed a search warrant of the officer’s home (Thursday) morning,” Boyer said. “Per the Department’s policy, Police Chief Sanchez placed the officer on paid administrative leave and initiated an internal affairs review of the matter.”

The search did not happen in Pasadena and the department is not working on the case, Boyer noted.

Sanchez and City Manager Steve Mermell intend to fully cooperate with the ATF and both are taking the matter seriously, Boyer said. Pasadena Councilman Victor Gordo on Thursday called on the city manager and police chief to “conduct a thorough investigation and act swiftly if any action is warranted.”

“Everyone is presumed innocent until proven guilty and we certainly should not in anyway make the mistake of faulting the very good men and women of the Pasadena Police Department who have absolutely nothing to do with this and likely have no knowledge of this officer’s alleged actions,” Gordo said.

Under state law, the results of the internal affairs review — including any discipline — will not be released to the public.

Staff Writer Brian Day contributed to this article.