A procession of first responders escorted the body of fallen firefighter Capt. Joel Barnes to a funeral home in Old Orchard Beach on Sunday.Barnes, 32, died battling an apartment fire in Berwick on Friday.The procession stopped at the Berwick Fire Department where Barnes served for more than two years. Barnes' father said Saturday that a firefighter told him Barnes saved his life during the fire by shielding him from the flames. His father says Barnes always wanted to be a firefighter.An investigation continues to determine what caused the fire. The fire was reported in a six-unit apartment building at 10 Bell St. at about 11 a.m. Friday.Four other firefighters who were injured were treated and released from Wentworth-Douglass Hospital in Dover, New Hampshire. Funeral arrangements are expected to be announced this week.Barnes was a paramedic and served as the Berwick Fire & Rescue training officer and emergency medical services coordinator, according to his family. He also served for several other Maine departments, including ones in Old Orchard Beach, South Berwick and York.Barnes joined the Berwick department in 2016. He was also a per diem firefighter in Acton.An initial finding indicates that Barnes was leading another firefighter in an interior attack of the fire when conditions suddenly worsened.“Capt. Barnes died a hero, battling a large and dangerous building fire. He made the ultimate sacrifice for his community,” Berwick fire Chief Dennis Plante said Saturday.“Firefighters run toward danger and into places that everyone else is running away from," Berwick Town Manager Stephen Eldridge said. "Capt. Barnes lost his life saving others. While we honor him, we are struck with a profound sense of grief today. On behalf of the enter Berwick community, I wish to thank everyone for their offers of support and expressions of condolence.”"It's with a heavy heart that I start this information to you with the announcement that this afternoon at this fire, we lost a firefighter in the firefight," Maine State Fire Marshal Joe Thomas said. "Capt. Joel Barnes, of the Berwick Fire Department, succumbed to his injuries that were received in fighting this fire."Maine Public Safety spokesman Steve McCausland said Barnes was one of two firefighters who encountered a wall of flames on the third floor and had to be rescued.McCausland said Saturday that a team of investigators from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives would come to Maine early next week to assist in the investigation. Investigators with the Maine State Fire Marshal's Office went to the scene Friday to investigate the cause of the fire.According to Captain Robb Couture of the South Portland Fire Department, the last time a Maine firefighter died in the line of duty was Captain Robert Wallingford Jr., who died at the Portland welding fire in 1996. According to information posted on the city of Portland's website, another Portland firefighter, Joseph C. Cavallaro, 26, of South Portland, died March 24, 1980, while fighting a fire at the Phoenix Nightclub at 83 Oak St.A procession left the hospital shortly before the announcement of Barnes' death. Fellow firefighters saluted as the procession went by. Barnes was one of four full-time firefighters in the department. Barnes was a Berwick firefighter for two years."My thoughts and prayers are with the family, colleagues, and friends of Berwick firefighter Capt. Joel Barnes, who lost his life fighting a four-alarm fire today," Gov. Janet Mills said in a statement. "Joel will be forever remembered for his courage and service to our state. I’d also ask every family in Maine to join with me in praying for the swift recovery of the four firefighters still hospitalized tonight.”A resident told WMTW News 8's Jim Keithley that the fire started on a third-story porch. She said she tried to put it out with a fire extinguisher. Barnes' family asks that any donations in his name be made to the Berwick Volunteer Firefighters Association, c/o Kennebunk Savings Bank, 2 School St., Berwick, ME 03901.