A special effects coordinator has been killed after an accident during an off-site special effects test for the DC Universe show, Titans. Production on the show has been shut down for two days due to the incident, EW has confirmed.

“We are heartbroken and devastated by the passing of our treasured colleague, special effects coordinator Warren Appleby, after an accident which occurred at a special effects facility during the preparation and testing for an upcoming shoot,” the show’s producers, Warner Bros. TV and DC Universe, said in a statement. “Warren is beloved by all who worked with him during an impressive 25-year career in television and motion pictures. The executive producers, along with everyone in the Titans family, Warner Bros. Television Group and DC Universe, wish to express our deepest condolences, and heartfelt love and support, to Warren’s family and friends at this most difficult time.”