Suicide bombing outside OU game

This is weird:

NORMAN, Okla. (AP) -- One person was killed in an explosion near a packed football stadium at the University of Oklahoma on Saturday night in what authorities said appeared to be a suicide.

This is irresponsible speculation. But about two months ago:

OKLAHOMA CITY (AP) -- A University of Oklahoma student was released on $10,000 bail Thursday after appearing in federal court to be formally accused of a felony for allegedly bringing a small explosive device into Will Rogers World Airport.
Federal agents arrested Charles Alfred Dreyling Jr., 24, on Wednesday at a security checkpoint after a Transportation Security Administration employee noticed something suspicious in his carryon luggage as it went through an X-ray machine about 9:30 a.m., FBI spokesman Gary Johnson said.

How many people at OU build bombs?
UPDATE: At least two, it seems:

NORMAN, Okla. -- A University of Oklahoma student was identified Sunday as the person who was killed in an explosion near a packed football stadium, authorities said Sunday.
The body is believed to be that of Joel Henry Hinrichs III, 21, according to a news release from Salvador Hernandez, special agent in charge of the FBI in Oklahoma. A student telephone book lists Hinrichs with a permanent address in Colorado Springs, Colo.