Update, 2:10 p.m. ET: Nashville police say that they were responding to a report regarding shots fired in the area when a recording began playing from the RV stating that a bomb would detonate in less than 15 minutes. It is still not clear whether there was anyone inside the RV when it detonated.

Police are still not sure of the bomber's motive or whether the placement of the bomb was intentional. The bomb, which exploded near the iconic AT&T building (dubbed "the batman building" because of its distinctive silhouette in the Nashville skyline) has knocked out cell service to many customers in the Nashville area. AT&T says they are working to restore service to everyone in the area.

President Trump has been briefed, and according to a statement from a White House spokesperson, "The president is grateful for the incredible first responders and praying for those who were injured."

The FBI is asking for help from the public to identify anyone who might have information about the bombing, including pictures of the area that might have been taken before or after the explosion.

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According to the Metro Nashville Police Department, an explosion that shook the downtown area of Nashville, Tennessee, appears to have been an "intentional act," although authorities still have not named any suspects. As of press time of this article, no deaths or critical injuries have been reported.

Although details of the incident are still hazy, police say that they received a call about a suspicious RV parked near the tourist district on Second Avenue downtown and hazmat teams were en route to the area when the explosion occurred around 6:30 a.m. Christmas morning.

The explosion appears to have devastated sections of Second Avenue and caused fires. Three people have been reportedly been transported to the hospital, but none with critical injuries.

The blast shook the entire downtown area and was reported on Twitter by numerous Nashville residents.

Nashville Police Department spokesman Don Aaron told CNN that the incident is being investigated by multiple agencies, including the FBI and BATF.

Numerous Nashville residents took to Twitter to document the Christmas morning scene of destruction.

This is a developing story and will be updated.