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AUSTIN, Texas (AP) – Federal agents said a package bomb exploded shortly after midnight Tuesday inside a FedEx distribution center in Schertz, Texas.

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Spokeswomen for the FBI and the ATF say both agencies were called to the scene.

Authorities say one of the parcel bombs detonated at around 1 a.m. Tuesday while it was on a conveyer belt in the facility, which is about 60 miles southwest of Austin. One worker suffered minor injuries.

Texas’ attorney general says the package was sent from Austin and was addressed to a home in Austin.

Attorney General Ken Paxton also told television station KXAN a second parcel bomb that didn’t explode was found at the FedEx facility in Schertz. San Antonio police Chief William McManus told a news conference there that the second package was one was “no longer” at the Shertz facility.

Federal agents say this package is likely linked to attacks by what they believe is a serial bomber.

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FBI Special Agent Michelle Lee says it is still early in the investigation, but “it would be silly for us not to admit that we suspect it’s related” to the four Austin bombings that have killed two people and injured four others since March 2. The latest bombing in Austin injured two men on Sunday.

Lee didn’t have details about the size, weight or description of the package.

The White House says the federal government is doing “whatever is necessary” to apprehend whomever is responsible for a series of explosions in Austin, Texas.

Spokesman Sarah Huckabee Sanders tells Fox News Channel that President Donald Trump is aware of the situation.

Sanders says federal authorities are working closely with local authorities and have offered their full support and cooperation “to make sure we’re doing whatever is necessary and whatever is possible” to stop the explosions and find whomever is responsible.

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(Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)