Investigators Friday have determined the cause of the deadly July 20 Iconic Village apartment fire in San Marcos, which killed five people and displaced more than 200, was an intentional incendiary act. 

The San Marcos Fire Department and the Houston Field Division of the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), who are leading the investigation, are now offering a $10,000 reward for any information leading to the arrest of a suspect.

ATF Special Agent Fred Milanowski said the ...