A delivery truck is parked in front of the Curtis Culwell Center parking lot Tuesday, May 5, 2015, in Garland, Texas. A man whose social media presence was being scrutinized by federal authorities was one of two suspects in the Sunday shooting at this location that hosted a cartoon contest featuring images of the Muslim Prophet Muhammad. The Islamic State group on Tuesday claimed responsibility for the attack.
A delivery truck is parked in front of the Curtis Culwell Center parking lot Tuesday, May 5, 2015, in Garland, Texas. A man whose social media presence was being scrutinized by federal authorities was one of two suspects in the Sunday shooting at this location that hosted a cartoon contest featuring images of the Muslim Prophet Muhammad. The Islamic State group on Tuesday claimed responsibility for the attack. AP
A delivery truck is parked in front of the Curtis Culwell Center parking lot Tuesday, May 5, 2015, in Garland, Texas. A man whose social media presence was being scrutinized by federal authorities was one of two suspects in the Sunday shooting at this location that hosted a cartoon contest featuring images of the Muslim Prophet Muhammad. The Islamic State group on Tuesday claimed responsibility for the attack. AP

Islamic State embrace of Texas attack is first claim of action in U.S.

May 05, 2015 12:36 PM

UPDATED May 05, 2015 06:36 PM

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