CNN  — 

A gunman who barricaded himself in a SunTrust Bank in Florida killed at least five people in the branch on Wednesday, Sebring Police Chief Karl Hoglund said.

The suspect called authorities to say he had entered the bank in Sebring, about 85 miles south of Orlando, and began shooting, according to Hoglund. Authorities identified the suspect as 21-year-old Sebring resident Zephen Xaver, who is in custody.

“We’ve suffered significant loss at the hands of a senseless criminal doing a senseless crime,” Hoglund said.

It wasn’t immediately clear if those shot were bank employees or customers. The victims have not yet been identified and family notifications have not yet been made, according to authorities.

Zephen Xaver

“This is a terrible day for Sebring, Highlands County and for the state of Florida,” Gov. Ron DeSantis said.

Suspect surrendered to SWAT team

After Xaver made his call to police, Sebring police and Highlands County sheriff’s deputies responded to the scene.

“I have shot five people,” the caller said, according to Sebring Police. Sebring Police and Highlands County Sheriff’s Office deputies responded to the scene.

Initial negotiations to get the suspect to leave the bank failed, so a SWAT team breached the building at 1:54 p.m. and continued negotiating, Hoglund said.

The suspect eventually surrendered to the SWAT team at the bank along US-27, between Lake Jackson and Little Lake Jackson, police said.

The FBI and the Florida Department of Law Enforcement are assisting in the case. Authorities are still investigating the motive.

A large number police vehicles and ambulances respond to the SunTrust bank in Sebring, Florida.

Suspect’s father says he is heartbroken for the victims

Josh Xaver, an Indiana resident who said he’s the suspect’s father, told CNN he’s “heartbroken for the victims.”

The elder Xaver said his son moved to Florida about a year ago.

“He wasn’t raised to be like this. He’s always been a good kid. He’s had his troubles,” the elder Xaver said by phone, without elaborating. “But he has never hurt anyone ever before. This is a total shock.”

“This is a total shock,” he said.

He had been a correctional officer trainee

Xaver was hired November 2 as a correctional officer trainee at Avon Park Correctional Institution and resigned two weeks ago, on January 9, said Patrick Manderfield, a spokesman for the Florida Department of Corrections.

He was hired by the facility on November 2 and resigned on January 9, Manderfield said.

SunTrust Chairman and CEO Bill Rogers said bank officials “are deeply saddened by the tragic shooting” at the branch.

“We are working with officials and dedicating ourselves to fully addressing the needs of all the individuals and families involved. Our entire team mourns this terrible loss,” Rogers said in the statement.

Sebring is in the south-central part of the state, with a population of just more than 10,000 at the time of the 2010 US Census.

“We ask that you please keep them in your prayers, keep them in your thoughts,” the police chief said of the victims. “Help Sebring and our community stay strong.”

CNN’s Chuck Johnston, Joey Hurst, Curt Devine, Kate Trafecante and Danielle Hackett contributed to this report.