A dozen agents with the FBI and the Riverside County district attorney’s office executed search warrants on Palm Springs City Hall yesterday. City Attorney Douglas Holland said staff were cooperating with the agents. Authorities also knocked on the door of an apartment listed as a home address by Mayor Steve Pougnet but no one answered. Items that were included in the search warrant for City Hall were recovered at Pougnet’s home, said FBI spokeswoman Laura Eimiller. She said the warrants were part of an effort involving a public corruption task force. Pougnet has been accused of a conflict of interest in the purchase of City property by a developer he works for. The task force is comprised of agents from the FBI, the Internal Revenue Service and the Riverside and San Bernardino County district attorneys’ offices.