A man suspected in a wave of bombings that terrorized Austin, killed himself with an explosion inside his car as authorities closed in, police in Texas said, ending a manhunt but leaving investigators scrambling to determine whether any bombs remain and if he acted alone.
A source with direct involvement in the investigation told CNN that Mark Anthony Conditt has been identified as the suspect in the Austin serial bombings.
He detonated the bomb early Wednesday on the side of Interstate 35 in Round Rock, north of Austin, as SWAT team members approached him, police said.
Investigators believe he is responsible for the five explosions that killed two people and injured five other in Austin or south-central Texas since March 2, authorities said. They also warned a wary public not to let down their guard.
Information from CNN.com contributed to this report.