A condominium in stately old Palo Alto was raided Thursday night as a "house of ill fame." Three adults were arrested on prostitution-related charges after Palo Alto police concluded a three-week surveillance of 780 University Ave.

Detectives Cang and Paneda reported that the surveillance was triggered by a complaint from an unidentified citizen who noticed "multiple men frequenting the condominium" while only women lived there.

Based on the surveillance, officers secured a search warrant, which they executed at 9:30 p.m. Thursday, Feb. 3. Officers arrested Feng Z. Cao, 52, from Redwood City, for pandering and "keeping or residing in a house of ill fame." They also arrested Danny Huang, 60, from Burlingame, and Mi S. Back, from Los Angeles, for prostitution and "keeping or residing in a house of ill fame."

Palo Alto police worked with Santa Clara County's "Specialized Enforcement Team" in the investigation and arrests.