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Federal authorities on Tuesday were investigating reports of a small explosion near the NAACP chapter office in Colorado Springs, Colorado.

A source described the device to NBC News as a “pipe bomb-type” explosive. There were no reported injuries and authorities could not confirm whether the NAACP office was specifically targeted.

Amy Sanders, a spokeswoman for the FBI in Denver, confirmed that the bureau was involved in the investigation. Colorado Springs police deferred requests for comment to the FBI.

In a statement, the NAACP said no one was hurt and that they "look forward to a full and thorough investigation into this matter by federal agents and local law enforcement."

SOCIAL

#BREAKING: CSPD & CSFD are on Moreno & El Paso streets after reports of dynamite thrown out of a car window. pic.twitter.com/8RaW1idNFY — KOAA News 5 (@KOAA_5) January 6, 2015

— Andrew Blankstein