Hannity on 'Fox & Friends': I Expect 'Criminal Charges' Against McCabe

A fourth explosion rocked a neighborhood in Austin, Texas, injuring two people Sunday night. 

Authorities say they believe the blast - possibly using a trip wire - is connected to three previous package bombings that occurred in a different area of the city. 

The first was a package bomb that exploded at a northeast Austin home on March 2, killing 39-year-old Anthony Stephen House. Two more package bombs then exploded farther south on March 12, killing 17-year-old Draylen Mason, wounding his mother and injuring a 75-year-old woman.

The packages were all left on doorsteps, not sent through the mail or other delivery company.

In Sunday's explosion, two men in their 20s suffered non-life threatening injuries, including reportedly nails in the leg. Police said the victims were either walking or riding bikes and triggered the device.

A $115,000 reward has been issued for anyone with information on the case.

Watch the report above. 

Ex-FBI Official Who Worked on Unabomber Case: Austin Package Bombings Are Similar

'A Horrible Day for Democracy': Jeff Flake Blasts McCabe Firing