A 1,500-foot transmission tower collapsed on Saturday, killing three workers, snapping power lines and causing a transformer to explode.
The maintenance workers were preparing to install a new antenna on the tower, which is used by several TV and radio stations, when it came crumbling down, police said.
Dallas-Fort Worth television station KXAS reported that a gust of wind caught the machine used to hoist materials to the tower. The device fell, breaking a guy wire and causing the tower to fall.
The names of the victims, who worked for Doty Moore Tower Services, were not immediately released. Company officials had no comment.
Firefighters in this Dallas suburb were battling the blaze caused by the explosion.
The antenna was shared by several UHF stations and several FM radio stations, which were temporarily knocked off the air because of the accident, said Bill Howell, an assignment editor at KXAS-TV, sister station to KXTX-TV, one of the stations affected.