"In total, six people have been transported from the scene to a hospital", Rocha said. "The scene is very active, it's still ongoing. Firefighters are trying to put the fire out".
First responders said the fire was caused after a freight-carrying barge hit a pipeline at the port of Corpus Christi.
Texas Governor Greg Abbott has issued a statement on the explosion in the port.
Photos and videos of the incident have emerged on social media platforms.
The US Coast Guard said in a press release that a team is searching for four missing crew members who were on the boat that hit the pipeline.