At least one person has been injured when a package bomb exploded at a FedEx facility near San Antonio in Texas early Tuesday. Federal agents said the incident is likely linked to attacks by a serial bomber that have killed two people in Austin, the Associated Press reported.

The incident happened at about 12:30 a.m. at the FedEx Ground distribution center in Schertz.

The San Antonio Texas Fire Department said a FedEx employee apparently suffered a non-life-threatening “percussion-type” injury from the blast.

A package believed to be bound for Austin exploded at a Texas FedEx facility early Tuesday, law enforcement officials said, opening another potential front in investigations into of a series of blasts that have left the Texas capital gripped with fear.

The San Antonio Texas Fire Department said one person suffered a “percussion-type” injury from the blast at the facility in Schertz, Tex., just northeast of San Antonio sometime around 1 a.m. The injury was not believed to be life-threatening.

A law enforcement source said that police were investigating whether the explosion was related to the other four in Austin, killing two people and injuring others. That “is definitely a concern of ours,” said the official, who spoke on condition of anonymity to discuss the latest incident. The FBI and ATF were at the scene.

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