LITTLE ROCK, Ark. (AP) — An empty gasoline tank undergoing repairs exploded Tuesday at a fuel storage facility in rural north Arkansas, killing three workers, authorities said.

The explosion occurred just before 2:30 p.m. at a storage facility owned by TEPPCO Partners LP, a Houston-based energy company, said spokesman Rick Rainey. The tank had been previously cleaned and workers were preparing to install a new gauge on it, Rainey said.

Three workers for an outside company contracted to do the repairs died in the explosion, said Tommy Jackson, a spokesman for the Arkansa...