The phrase "area was locked" is correct and usable in written English.
It can be used to describe a situation where access to a specific area is restricted or secured.
Example: "Due to safety concerns, the area was locked after hours to prevent unauthorized access."
Alternatives: "zone was secured" or "section was closed off".
The area was locked down afterward.
The Prime Minister, Theresa May, swiftly left the premises, and the entire area was locked down.
The owner of nearby Coronel Tires said in a telephone interview that the entire area was locked down.
After the standoff began, the area was locked down and streets were filled with police cars and fire trucks.
The police said Mr. Welch could not go far from the scene of the shooting because the area was locked down by the police, so he simply went back to his house, at 531 South Clinton Street.
The area was locked in civil war in the mid-1990's, and Erbil itself was briefly held by the Iraqi military in 1996, when the Kurdistan Democratic Party invited Mr. Hussein to attack and expel the Patriotic Union of Kurdistan.
22 At Odds Over Airport Plans The Chicago area is locked in a complex debate over competing plans to expand airport capacity.
Schools in the downtown area were locked down for hours after the attacks as the police tried to determine whether the gunman acted alone.
Some newer systems use DVD's that hold the entire country's data on one disc; all but your local area is locked until you pay for the others.
Within a few years, after the fall of the Soviet Union, organized criminal groups in the area were locked in fierce battles to control former state resources, grabbing buildings and land.
Even as schools in the area were locking down, the men insisted that they were "educating the public" about their Second Amendment rights.
