Texas Bomb Attacks: Austin bombing suspect kills self in explosion as police close in

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Welcome back to global watch. To the US, where the suspect believed to be behind 5 consecutive bombings in Austin, Texas has killed himself in an explosion as police moved in on his location. Jay Gray has more.

The focus of the investigation has shifted to Pflugerville now. Police and federal agents searching the home of suspected serial bomber Mark Anthony Conditt.

GREG ABBOTT TEXAS GOVERNOR "We knew we were going to be able to apprehend him, we just didn't know when."

It happened overnight in round rock, just north of Austin--as Conditt was cornered by police.

CHIEF BRIAN MANLEY AUSTIN POLICE DEPARTMENT "As members of the Austin police department swat team approached the vehicle, the suspect detonated a bomb inside the vehicle."

Exclusive information obtained by NBC News outlines how investigators tracked down the 23-year-old, what federal agents call "exotic" batteries ordered online from Asia, tied the attacks together. The cell-site analysis helped them learn Conditt's phone number - he used his cell hours before police closed in.

And this surveillance video of Conditt wearing a hat and wig. Allowing police to conclusively determine he was the prime suspect.

In a string of bombings over three weeks that killed two and injured 4 before the blast that apparently killed Conditt inside this SUV along Interstate-35.

As the search for clues continues. There is still a concern.

CHIEF BRIAN MANLEY AUSTIN POLICE DEPARTMENT "We need to remain vigilant to ensure no other packages have been left throughout the community."

A bomb dog searched his parents home.

DETECTIVE DAVID FUGITT AUSTIN POLICE DEPARTMENT "They have gone above and beyond to answer any questions we have had."

Investigators say the family, like so many here, is stunned.

DETECTIVE DAVID FUGITT AUSTIN POLICE DEPARTMENT "They are having a difficult time. They want to express their condolences to those that have been affected."

In a community, breathing a sigh of relief. But still not ready to let down its guard.

JAY GRAY PFLUGERVILLE, TEXAS "Now all of these families in this locked down neighborhood behind me have been moved out of their homes as the investigation continues with no clear indication of when they'll be allowed to return. In Pflugerville, Texas, JAY GRAY, CGTN."