WASHINGTON: Two suspects who may have been carrying bombs were shot dead late on Sunday, and a police officer was wounded, outside a Prophet Mohammad (PBUH) art contest in Texas, organisers said.
The American Freedom Defense Initiative organised the event featuring far-right populist Dutch politician Geert Wilders, who has been outspoken against Muslims.
"#garlandshooting cop shot - two suspects dead, awaiting bomb squad for possible explosives at our free speech event #sharia," political activist and AFDI co-founder Pamela Geller wrote on Twitter.
Cop shot, 2 suspects shot - possible explosives at our free speech event #freespeech #afdi #jihad— Pamela Geller (@PamelaGeller) May 4, 2015
#garlandshooting cop shot - two suspects dead, awaiting bomb squad for possible explosives at our free speech event #sharia— Pamela Geller (@PamelaGeller) May 4, 2015
Wilders also commented on the incident, saying: "Shots fired at Garland Mohammad cartoon free speech event. I just left the building after speeching. #garlandshooting."
SWAT officials told ABC television news affiliate WFAA that the two male suspects drove up and opened fire on the Curtis Culwell Center in Garland, near Dallas, which was hosting the exhibit and cartoon contest billed as a "free speech" event.
The police officer was shot in the leg and was rushed to hospital, where he was expected to recover, according to local CBS news affiliate DFW.
Police were searching the area for a vehicle containing explosives.
A local police-themed blog that posts information coming from public scanner radio said a suspect had been spotted at a nearby store with a hand grenade, and that the expo center and surrounding businesses were evacuated.
The FBI reportedly activated an electromagnetic pulse near Garland, Texas, centre to activate anything that sends or receives an electronic transmission while investigating possible bomb threat.
CBS then reported that a blast was heard near Garland, Texas, centre after FBI bomb squad used electric pulse to detect bombs.
Some Tweeps have attacked both Geller and Wilders over the event.
@BBCBreaking @BBCNews Geert Wilders! A controversy magnet!— StuartTheBadger (@badgerH531) May 4, 2015
Will organisers of the cartoon event leading to the #garlandshooting stop martyring themselves? The CharlieHebdo2.0 narrative is upsetting.— Uzma Atcha (@TheAtcha) May 4, 2015