ANCHORAGE (KTUU) - 10:15 a.m. Update:
One woman is in custody Tuesday morning following a standoff with police that involved homeland security.
According to authorities, the adult female was contacted by Anchorage Museum security personnel after they observed her in a loading area behind the building.
They asked her to leave, but police say she refused and threatened them with a knife. She then made additional threats, including that she was equipped with a bomb.
"She was crouched down in a stairwell hiding," said Thim. "She then continued to making violent threats, saying she had an explosive in her backpack, and that she was going to blow up herself, officers, and the museum."
Police then contacted the Department of Homeland Security to work on evacuating the museum during the incident.
Eventually, police deployed canisters of pepper spray and tasers, subduing the woman and eventually allowing them to make the arrest and take her into custody. Thim said that part of the reason that they blocked off the surrounding area was that they "knew that pepper spray or gas would be one possibility." One officer suffered side effects from making contact with pepper spray.
No explosive elements were found at the scene. The suspect was arrested on charges including assault and making terrorist threats. Her name will be released.
This is a developing story and will be updated with further information.
Police activity in downtown Anchorage on Tuesday morning shut down sections of streets and closed off areas near the museum while authorities responded to a "disturbance" situation.
As of 9:20 a.m., police officers could be seen standing behind squad cars with rifles drawn near the Anchorage Museum. They later deployed gas canisters.
It began at 7:50 a.m. Tuesday, when police say they received a "disturbance call" from someone in the area. The nature of the call, and the corresponding disturbance to which authorities then responded has not been specified.
The exact area of the disturbance seems to be localized to the 600 block of C Street, near 6th Avenue. In a community alert, police asked people to avoid this area and for drivers to take alternate routes.
MJ Thim, a spokesperson with the Anchorage Police Department, could not comment on the exact nature of the developing incident, but did specify that APD is asking people to avoid the area due to safety concerns.