Serial bomber suspected after blasts

AUSTIN, Texas - A package bomb containing nails and shrapnel that was destined for an address in Austin, Texas, exploded at a FedEx Corp distribution center in San Antonio, injuring one employee, fire officials said.

That blast came two days after the latest of four powerful homemade bombs set off in Austin this month that have killed two people and injured six more in what police warn appears to be the work of a serial bomber.

The package exploded shortly after midnight local time at a distribution facility in Schertz, Texas, outside of San Antonio, about 100 kilometers south of Austin, the San Antonio Fire Department said on Twitter.