It appears to be the work of one lone gunman as shooting broke out earlier today at Houston's Bush Intercontinental Airport.

According to reports from the Houston Police Department, the man fired at least two shots into the air inside Terminal "B".

Shots were fired near a ticket counter at Houston's largest airport on Thursday, and the man who was killed after being confronted by a law enforcement official.

It's unclear if the man fatally shot himself or was killed by a Homeland Security agent who had confronted him, said Houston police spokesman Kese Smith. The man's name was not released by police, but they said he was about 30-years-old.