The Harris County sheriff's office says the Texas college shooting was an altercation between two individuals.
One of those involved was a student at Lone Star Community College.
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The world’s first nuclear bomb attack struck the Japanese city in 1945.
The 40-year-old Love Island presenter died in February this year, weeks before she was due to stand trial accused of assaulting her boyfrien
Survivors, their relatives and other participants marked the 8.15am blast anniversary on Thursday with a minute of silence.