Fourth person suffers heart attack during Lone Star College shooting in Houston

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Someone  a fourth person  suffered a heart attack, according to a federal law enforcement source who is receiving reports from the scene, CNN’s Carol Cratty reports.

So, recapping what we’ve been told:

 Three people, including a gunman, were wounded in a shooting between two people on the North Harris campus of Lone Star College in Houston, school spokesman Jed Young said.
 The second gunman is on the loose but not believed to be on campus, Young said.
 A fourth person suffered a heart attack, according to the federal law enforcement source.
 The shooting happened at a campus library, the federal law enforcement source says.
 No deaths have been reported.