At least five people have been killed in an attack at Fort Lauderdale airport by a gunman who had reportedly previously told the FBI he was being forced to fight for Daesh, British newspaper the Telegraph reported on Saturday.

Esteban Santiago, a 26-year-old who had been treated for mental health issues, opened fire inside the baggage area of the busy airport and was taken into custody at the scene. He was carrying military ID and was wearing a Star Wars t-shirt.

On Friday night law enforcement officials reportedly said that in November last year, Santiago had told the FBI in Anchorage that voices in his head were forcing him to join and fight for Daesh. Officials said he was not on a watch-list of people suspected of Islamist radicalization.

Santiago had a history of mental illness and had voluntarily checked himself into a mental health facility.

There were questions on Friday night over how he was able to retain and transport a firearm, given his history of mental illness and contact with the FBI.

Officials said the man had checked in his unloaded weapon when he boarded a flight in Anchorage. There were also reports there had been an "altercation" on board. 

Upon arrival in Fort Lauderdale , the man went to load the weapon in the lavatory area and then began shooting.

The attack happened around 1pm local time, as the busy airport, which is a major hub between the US, Europe and the Caribbean, was packed with tourists.

Source: MENA