Authorities across Texas are investigating after a series of explosions have left two dead and four others seriously injured.
"A package had been traveling along the automated conveyer when it exploded", Schertz Police Chief Michael Hansen said at a Tuesday morning press conference.
Audio will be available later today.
Since the bombings began city police have responded to some 700 suspicious package calls, the Austin-American Statesman said. Federal Bureau of Investigation agents say that the bomb and the previous attacks in Austin are likely linked by a suspected serial bomber.
"This is a very fluid investigation, and we want the general public to know their safety is our number one priority", Ortega said.
Hours later, the fourth blast was triggered when two victims either stepped on or kicked a tripwire as they were walking on a sidewalk in the Travis Country neighborhood of Austin.
Grote said his son, who lives about 100 yards (91 meters) away from the blast, heard the explosion and raced outside. The tripwire set off the explosive device that was placed near a fence at 8:32 p.m. on Sunday March 18, police said. Federal officials on the scene said she had ringing in her ears and was treated and released.More news: Alibaba to invest additional 1.44 billion pounds in Lazada, replaces CEO
During a news briefing, McManus had said officials believed a second package found at the Schertz facility was "also loaded with an explosive device that they are working on right now". That information came from SanantonioFIRE, a local media website that reports on local police, fire and emergency service news, and could not immediately be independently confirmed.
An FBI spokeswoman, agent Michelle Lee, said earlier Tuesday "it would be silly for us not to admit that we suspect it's related" to the Austin bombings that have killed two people and injured four others since March 2. The package Sunday apparently was left on the side of a road in the city. Those men are in good condition at St. David's South Austin Medical Center, a hospital representative said.
Randall Rogan, a Wake Forest University professor who is an expert on forensic linguistic analysis, said the person or people behind the explosions may get a thrill from evading capture.
When asked whether the news about the bombings has made him nervous about coming to work, he said: "I try not to think about it, especially since I work (at a package shipper)".
"The agencies have to assume that the explosion in Schertz is connected to the serial bomber in Austin until proven otherwise, based on the timing and the circumstances", Gomez said.
Officials said two men were out for a walk when police say they may have crossed a tripwire, creating an explosion.
"T$3 he package was moving from an elevated conveyor belt to a lower section when it exploded", according to CBS Austin, noting that it "contained shrapnel consisting of nails and pieces of metal, sources said".