Lockdown at US Base in Japan Lifted After Report of Shots Being Fired

— -- A lockdown that had been placed on a U.S. Navy base in Japan Thursday morning after a report of shots being fired in one of the base's building has been lifted, officials announced.

"All clear at Fleet Activities Sasebo. No evidence of a shooter. No casualties. Base has returned to normal operations," U.S. Naval Forces Japan tweeted.

The U.S. Fleet Activities Sasebo is a U.S. Navy base located in Sasebo, Japan, on the island of Kyushu.

And Commander Ron Flanders, a spokesman for U.S. Naval Forces Japan, "We have returned the base at Fleet Activities Sasebo to normal operations. All clear. No casualties. No evidence of a shooter."

Earlier in the morning, U.S. Fleet Activities Sasebo posted on its Facebook page, "THIS IS NOT A DRILL!!! On Nov. 3, 2016 at 9:33 a.m. security recieved a report of gunshots heard inside building 141 (MCMRON). The building was evacuated."

The post continued, "Security and fire are on scene and have established a perimeter. Security is currently clearing the building, please stand by for further information. So far there are no reports of injuries. Please remain sheltered in place until further notice."

According to the website for the navy base, "The important bilateral relationship between Japan and the United States that exists today is very much in evidence at U.S. Fleet Activities Sasebo, where ships of the Japan Maritime Self Defense Force and the United States Seventh Fleet share this excellent port."

The base first broke news of the lockdown initially writing, "THIS IS NOT A DRILL- CFAS is on lock down. Everyone on main base needs to shelter in place immediately!!! Please stay calm and we will update you as we receive more information."

ABC News' Joshua Hoyos, Sarah Shales, Luis Martinez contributed to this report.