The park outside the courthouse has been a gathering spot for protesters, journalists and gawkers throughout Trump’s trial, which began with jury selection Monday.
Through Friday, the streets and sidewalks in the area around the courthouse were generally wide open and crowds have been small and largely orderly.
Authorities said they were also reviewing the security protocols, including whether to restrict access to the park. The side street where Trump enters and leaves the building is off-limits.
“We may have to shut this area down,” New York City Police Department Deputy Commissioner Kaz Daughtry said at a news conference outside the courthouse, adding that officials would discuss the security plan soon.