SAN ANTONIO, TX (CNN) - Investigators are trying to determine whether an explosion early Tuesday at a FedEx facility outside San Antonio is connected to four explosions that have rattled the Austin, Texas area this month.
The most recent blast happened inside a FedEx facility in Schertz, Texas, FBI San Antonio spokeswoman Michelle Lee said. Schertz is a San Antonio suburb that is roughly an hour's drive southwest of Austin.
One FedEx team member suffered minor injuries when a "single package exploded" at the ground sorting facility, company spokesman Jim McCluskey said Tuesday in a statement. An ATF spokeswoman earlier had said no one was hurt.
"We are not providing any additional specific information about this package at this time," McCluskey said.
Based on preliminary information gathered at the scene, Lee said there could be a connection with the four Austin explosions, which killed two people and injured four others over 17 days starting March 2.
"We suspect it is related to our investigation," Lee said.
If the FedEx incident is confirmed to be linked to the Austin blasts, it would represent a new method for the suspect or suspects. None of the four previous explosives was mailed.
The ATF could not confirm that the latest explosion is associated with the Austin blasts, ATF spokeswoman Nicole Strong said. The ATF's Houston field division is at the FedEx facility in Schertz, the agency said on Twitter.
FedEx is "working closely with law enforcement in their investigation," McCluskey said.
In Austin, authorities have been combing for clues to the four explosions there -- the first three of which involved cardboard packages that were left in front yards or porches and weren't delivered the US Postal Service or services such as UPS or FedEx, police say.
In the fourth blast, a device was triggered by a tripwire, injuring two men, police said.
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