At least one employee was injured when a package containing nails and shrapnel that was bound for Austin, exploded at a Texas FedEx facility. It is the fifth potentially deadly device targeting the state capital. A FedEx employee was injured when a package containing nails and shrapnel detonated shortly after midnight local time at a distribution facility outside San Antonio, about 65 miles south of Austin. It is not clear yet that whether the explosion was related to a string of bombings in the Texas capital over the past two weeks that have killed two people and wounded four. The Federal Bureau of Investigation (FBI) investigation is underway. The first three devices in Austin were parcel bombs dropped off at night in front of homes on the city's east side, with the fourth a tripwire device that went off in a west side neighborhood on Sunday. According to the police officials, all four devices were similar.