SCHERZ, TX (RNN) - A worker was injured when a package exploded at a FedEx shipping facility, half an hour outside of San Antonio, media reported.
The incident happened after midnight Tuesday, KSAT reported.
The FedEx employee suffered a "percussion-type" injury from the blast, and it's not believed to be life threatening.
The package contained metal shrapnel and nails and was reportedly headed to Austin on a conveyor truck when it exploded, media reported.
The FBI, the Bureau of Alcohol, Tobacco, Firearms and Explosives and local authorities are investigating the blast.
An FBI spokesperson said that it's "more than likely" the explosion is linked to a string of bombings in Austin, TX, which is an hour away from Schertz, TX. A series of four bombings there have killed two and injured four.
"We are clearly dealing with a serial bomber," Austin Police Chief Brian Manley said on Monday.
Authorities originally believed the attacks there could be racially motivated, but the fourth bomb appeared random, rather than targeted, the Associated Press reported.
The latest Austin bomb used a trip wire and injured two. Those victims are expected to fully recover.
Local, state and federal officials are investigating the bombing, with rewards for information rising into six figures.
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