Two FBI agents were shot dead and three were wounded on Tuesday while serving a search warrant on a suspect in a child pornography case in the southern US state of Florida, the FBI said.

The suspect is also dead, the Federal Bureau of Investigation said in a statement.

The FBI and media reports said the shooting took place around 6:00 am in Sunrise, Florida, when agents arrived to execute a search warrant at the suspect's home.

"Two FBI Agents are deceased and three are wounded," the FBI said.

Two of the wounded agents were taken to hospital and are in stable condition, it said.

A law enforcement source told the Miami Herald that the suspect had shot and killed himself after barricading himself in his home for several hours.

The newspaper said the FBI agents had been seeking to seize the suspect's computer and other evidence in a child pornography case.