Texas is grappling with a wave of package bombings - here's what's happened so far

Tamir Kalifa/Reuteres

Police maintain a cordon near the site of an incident reported as an explosion in southwest Austin, Texas, March 18, 2018.

Local law-enforcement officials in Austin, Texas, are working with their state and federal counterparts to track down a serial bomber who is believed to be targeting neighborhoods around the state capital.

Law enforcement officials confirmed that a suspicious package found at a FedEx facility in Austin, Texas, on Tuesday was an unexploded bomb - the sixth such incident that has rattled the region since March 2.

So far, the bombs have killed two people and injured four others. Police said they believe the incidents are all related "because of the specific contents of these devices."

In light of the explosions, which have so far followed a similar pattern in areas surrounding Austin, law-enforcement officials said people should not handle any unexpected or suspicious packages, and instead call 911.

Here's a timeline of all the suspicious packages and bombs that have been discovered near Austin so far: