SAN FRANCISCO — Silicon Valley technology giants Apple, Facebook and Google, in a rare joint statement, condemned the National Security Agency and other government organizations for mining internet users’ private data on Thursday.

The media titans called the agency “un-American” and vowed not to cooperate with federal agencies and authorities unless directed by a lawful court order or warrant.

“We are appalled that the federal government would spy on its own citizens, who have not been accused of any crime or infraction,” said Alexandra Forrest, a Google spokeswoman.