The man charged in connection with the Fort Lauderdale, Fla., airport shooting earlier this month said he carried out the attack on behalf of the Islamic State in Iraq and Syria (ISIS), CNN reported Tuesday.

FBI special agent Michael Ferlazzo testified Tuesday at Esteban Santiago's bond hearing, telling the court that during an interview shortly after the attack, Santiago said he was fighting for ISIS.

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Santiago also told Ferlazzo, who conducted the interview, that he had been in contact with people with similar views in jihadi chat rooms who were also planning attacks, CNN reported.

ISIS has not claimed responsibility for the shooting.

The shooting earlier this month at the Fort Lauderdale airport killed five people and wounded more.

Before the attack, Santiago had voluntarily turned himself into the FBI office in Anchorage, Alaska. The office turned him over to the local police, who took Santiago to a hospital for a mental health evaluation.

Following a series of checks, he was cleared and the case was subsequently closed.

The FBI said earlier this month that Santiago had gone to Florida specifically to carry out the "horrific attack."

The judge ruled that Santiago will be held without bond; his next court appearance is scheduled for Jan. 30.