ODESSA/MIDLAND (CBSDFW.COM) — The suspect accused of shooting and killing seven people this weekend in the Odessa-Midland area was fired from his job the morning of the fatal rampage.

Seth Ator, 36, was let go from his job with an Odessa trucking company Saturday morning — just hours before the shooting that left seven dead and over 20 injured.

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However, sources close to the investigation told CBS News that they don’t believe his firing was the motivation behind the shooting, and that nothing worth noting was found while executing a search warrant in a metal shack connected to Ator.

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An Odessa address connected to Seth Ator (Credit: CBS)

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At the moment, there is still no clear motivation for the attack and investigators are still trying to figure out how Ator obtained the AR-style rifle.