Third Package Explosion in Austin in Two Weeks

Austin police investigate an officer-involved shooting on La Naranja Lane

According to court filings, House had a 6-year-old daughter at the time of his bankruptcy. A woman in her 80s is reportedly being treated for an "unrelated medical issue".

"It shook my house and it shook my body", Isaiah Guerrero told CNN affiliate KXAN of the explosion that injured the elderly woman.

"Very scary. Just in total shock".

"They're not going to let this slide", Philips said.

In all three cases, packages were left on a doorstep during the night and residents found them in the morning.

The bomb squad and FBI are now at the scene assisting the Austin Police Department with the investigation.

The United States Postal Service told police that they reviewed their records, and they confirmed that the package did not come through the postal service. Before the second and third explosions happened, police had not ruled out the idea that House had made the bomb himself and had been investigating his death as suspicious.

Police were processing the scene at the first Monday explosion when the second occurred. They also said her mother, Maria Moreno, suffered minor injuries.

The victim of the second Monday blast was a woman in a wheelchair who had been watering her grass, said Brandon Rendon, a 27-year-old contractor who lives four houses down from her home in the mainly working-class Hispanic Montopolis area. A cardboard box had also been left in front of her house.

She is in the hospital in serious condition.

Both explosions Monday follow a deadly explosion at a home in Northeast Austin on Friday, March 2.

At least two people have been killed in a series of three explosions in East Austin since March 2.

Ten days later, that changed when a pair of packages detonated at homes several miles apart Monday over a matter of hours.

Manley says since the first bomb was before SXSW, he does not believe festival-goers are a target or the cause.

However, a motive in the three incidents remains unclear at this time. The blasts occurred far from the heart of South By Southwest, which happens mostly in downtown Austin.

The two victims killed in the explosions are relatives of prominent members of Austin's African American community, the Washington Post reports.

Manley suggested that residents call 911 if they find a suspicious package and to leave their homes or wait in the rear until officials arrive.

Authorities believe the explosive parcels were not delivered through the mail, but brought directly to the front doors of victims living in different regions of the city.

All the victims were minorities, and investigators are looking into whether race was a factor. Monday, the police had received 82 calls about suspicious packages.

The police chief refused to provide many details about how the explosives were packaged, citing the ongoing investigation. "Every stop will be pulled out".