US Police has given the "all clear" on Thursday morning, following a lockdown at a Navy Yard in Washington DC.
The Navy Yard was filled with police and ambulance vehicles as police were field scanning the area after it was reported that gunshots were heard by a worker.
Authorities announced the area was clear of any danger and that there was no evidence of any gunshots.
Federal agencies have been on high alert for attacks on the US Independence Day holiday weekend.
Chief Cathy Lanier of Washington's Metropolitan Police Department spoke regarding the issue on Thursday saying “An employee thought they heard something of concern, they made a call."
“We don’t believe that it was a malicious hoax or incident like that,” she added.
US Navy also confirmed there was no sign of a shooting.
The Washington Navy Yard (WNY), located in Southeast Washington, DC, is the oldest shore establishment of the US Navy.
The military facility was the site of a mass shooting that took 12 lives on Sep. 16, 2013, when a gunman got into a building at the Navy Yard.
Aaron Alexis, the gunman, who was a civilian contractor and former Navy reservist suffering from mental health problems, was shot by police after the attack.
The Navy Yard currently functions as a ceremonial and administrative center for the US Navy and is home to many other facilities.