At least two people shot outside Muhammad cartoon exhibit in Texas

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GARLAND, Texas — Two people were shot and killed by police outside of an event billed as the “Muhammad Art Exhibit and Cartoon Contest” in Garland, Texas, Sunday night, according to Garland Mayor Douglas Athas.

According to the City of Garland Facebook’s page, “two males drove up to the front of the building in a car,” as the event was coming to an end. “Both males were armed and began shooting at a Garland … security officer. Garland Police officers engaged the gunmen, who were both shot and killed. ”

Athas said the security guard was shot in the leg and transported to a local hospital. His condition is unknown.

CNN producer Chris Lett, who was covering the event, said there were about 40 people gathered when police announced there had been a shooting.

Authorities are investigating whether explosives were involved.

“Police suspect the vehicle may contain an incendiary device and the bomb squad is on the scene,” according to Garland Facebook’s page.

The event, sponsored by the American Freedom Defense Initiative, claimed to have received “over 350 submissions of Muhammad cartoons from all over the world.”

Athas told CNN that there was a significant police presence at the exhibit and that it was “secured event.”

A law enforcement official told CNN that the FBI is monitoring the incident and stands ready to assist should the need arise.