Explosion rocks Dallas apartment building as massive fire sends black smoke into sky, at least 4 injured

At least four people were injured after an explosion and fire broke out at a two-story apartment building in Dallas' Oak Cliff neighborhood, authorities say.

At least four people were injured after an explosion and fire broke out at a two-story apartment building in Dallas' Oak Cliff neighborhood, authorities say.

At least four people were injured after an explosion and fire broke out at a two-story apartment building in Dallas' Oak Cliff neighborhood, authorities say.