(CNN) — Fort Lauderdale, Florida — Esteban Santiago, the man charged with killing five people at the Fort Lauderdale airport, told FBI agents he carried out the attack on behalf of ISIS, FBI special agent Michael Ferlazzo testified at Santiago's bond hearing Tuesday.

The agent did not elaborate on whether Santiago was purporting to be linked to ISIS or simply inspired by the terrorist organization.

Federal authorities in Alaska said Santiago told them prior to the attack that he was hearing voices and that his mind was being controlled by the CIA. Santiago made no such claim during the six-hour interview conducted shortly after the January 6 shooting at Fort Lauderdale-Hollywood International Airport, Ferlazzo testified.

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