An EMS worker was on duty when his wife and their two children died in a blaze that swept through their RV home late at night in north-central Texas.

The tragedy occurred on Monday, Aug. 17, around 9:51 p.m. local time, when first responders were dispatched to a reported structure fire on Lake Country Drive in Parker County, the Parker County ESD 6 said in a statement. Initially, firefighters were told that three people who lived inside the home were unaccounted for.

When crews arrived, they found the residence “fully engulfed in flames” and immediately began trying to control the fire so team members could enter the structure. Firefighters first found two victims inside and located the third victim a short time later. All three people were pronounced dead at the scene, officials said.

A total of three agencies responded to the deadly blaze, which is still under investigation by the Parker County Fire Marshal’s Office. (The agency did not immediately respond to PEOPLE’s request for comment.)

Following the life-altering incident, the victims have been identified as the family of Herstle Renfroe, who has worked with Sacred Cross EMS for the past eight years and also served as a volunteer firefighter with the Palo Pinto Volunteer Fire Department, the Palo Pinto County ESD1 said.

The agency confirmed that Renfroe’s wife, Alexis Renfroe, and their two young sons, 4-year-old Alekzander Joshua Renfroe and 10-year-old Cody Lock Jr., all died in the fire while he was at work, serving the local community.

“Just sad thinking about the kids and the wife,” Simpson told WFAA. “It’s senseless.”

In the wake of the tragedy, fellow first responders and locals are rallying around the grieving father and husband.

“For years, Herstle has answered the call when others were facing some of the worst moments of their lives,” said Palo Pinto County ESD1. “Today, it’s our turn to answer the call for him.”

The department said that the MWAN Benevolent Fund for First Responders has launched its first campaign to help cover funeral costs and other expenses after he lost his home and all of his belongings.

“Please continue to keep Herstle, Alexis, Alekzander and Cody in your thoughts and prayers,” the organization continued. “Let’s show Herstle that he does not have to walk through this alone.”