AUSTIN, Texas - Austin Police Department interim Chief Brian Manley during a press briefing just after 4 p.m. Tuesday announced a $50,000 reward for information leading to the arrest of the person or persons responsible for a series of residential package explosions.

That’s on top of a $15,000 reward announced by Texas Gov. Greg Abbott on Monday.

In order to collect that reward money, tips must be submitted to Crime Stoppers at 1-800-893-TIPS (8477).

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During the briefing, Manley again called on the Austin community to report any suspicious packages left at their homes. Residents are urged to call 911 if it appears the package wasn’t delivered by the United States Postal Service or other delivery services such as UPS.

Manley said his department has so far investigated 265 calls concerning suspicious packages since Monday. He said no other packages have been determined to pose a threat.

Manley elaborated on the first explosion, which occurred on March 2 and claimed a man’s life in North Austin. He said investigators initially theorized the bombing was in retaliation for a drug bust that occurred three days earlier. Investigators at the time thought the incident was isolated. They now believe the three explosions are linked based on evidence.

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In addition, an FBI spokesman said his department has brought in profilers and bomb techs to aid in the investigation. The ATF, DPS and USPS are working on the investigation as well.