The victim is now being treated at a nearby hospital for a gunshot wound to his upper chest, according to local Guadalajara newspaper El Informador. He was followed a man wearing a purple T-shirt, who was hanging out near the auto park's exit, who eventually pulled out a gun, fired once, and then ran away.
"The FBI offers a reward of $20,000 for information that leads to the identification of the subject who shot a United States consular official today in Guadalajara", the consulate said in a statement.
"According to the medical report, he is in stable condition", the Mexican attorney general´s office said in a statement while the Federal Bureau of Investigation offered a $20,000 reward for information about the shooter.
Mexico's federal attorney office released a statement just a few hours later, saying that it was working with the U.S. embassy to find those responsible for this unfortunate event.
"The safety and security of our employees overseas is among our highest priorities", said an embassy spokeswoman who was not authorized to be quoted by name.
The US State Department did not immediately respond to a request for comment, but the department has previously warned Americans, including US officials, to exercise caution in the region due to "continued instability".
No motive is known for the shooting and the USA embassy has declined to identify the wounded official.