At 6:55 a.m., police said they were called to a home in the 1100 block of Haverford Drive, near East Howard Lane and Harris Ridge Boulevard, in the Harris Ridge neighborhood.
The explosion happened hours after a package bombing a few miles away that killed a teenager and seriously injured a woman. Later that day, a 75-year-old woman was injured in a separate incident when she did the same. Mayor Steve Adler, City Manager Spencer Cronk, and members of the Federal Bureau of Investigation joined Manley for today's press conference, though only Manley spoke.
"Very scary. Just in total shock". "It's just a grandmother, you know what I mean?"
"These are very powerful devices", he said, declining to be specific. Manley said the package exploded after they opened it. They were not mailed or sent by a delivery service. Boulevard, an explosion was reported. Though he did not say festival goers should be overly anxious, he stressed the importance of "if you see something, say something".
A woman at the home was transported Monday to Dell Seton Medical Center with life-threatening injuries, Austin Travis County EMS said.
"We don't know what the motive behind these may be", Manley told reporters.
In all three cases, two Monday and one on March 2, a package exploded at someone's home.
"We're looking at any possible avenues in these two cases", Manley said. He said the explosions do not appear to be connect to SXSW. Manley said Monday's first explosion is similar to the March 2nd explosion and is "likely related".
However, a motive in the three incidents remains unclear at this time.
Authorities are urging residents and visitors, who are there for the South by Southwest Interactive Festival to be careful. Per CNN, Austin Police have determined that the targeted properties are all owned by African-Americans, and they're therefore trying to determine whether these are a hate crimes.
Austin police said after the March 2 explosion they had no indication that the fatal blast was related to terrorism.
The second explosion occurred this morning at 6:45 a.m. on Monday, March 12 in northwest Austin, in the 4800 block of Old Fort Hill Drive, near the intersection of Springdale Road and East Martin Luther King Jr. Police reported she picked up a package from her front porch, which exploded. Packages should not be touched; instead, Manley said to "go to the back of the residence and stay there" until law enforcement arrives to clear the area.
With this week being spring break for grade school students, McManus advised parents to educate their children about suspicious packages and what to do if they see one.
Both the ATF and the FBI have joined the Austin PD in the investigation.