Five people have been killed in a gun attack in Florida.

The shooting happened at the SunTrust Bank in Sebring, a town south of Orlando.

The 21-year-old suspect called police and said he had fired shots inside the bank, according to authorities.

After negotiators failed to convince the suspect to leave the bank, the Highlands County Sheriff's Office SWAT team entered the building and continued to talk to him, police said.

He eventually surrendered and is now in custody.

"We have at least five victims, people who were senselessly murdered," Police Chief Karl Hoglund told a news conference.

Police have not yet established a motive for the attack.

Florida Governor Ron De Santis said he has asked the state's department of law enforcement to assist local police officials in the investigation.

A spokeswoman for the bank, Sue Mallino, said, "We are working closely with officials and seeking to take care of everyone affected at our Sebring, Florida branch