At least two structural columns buckled and failed in a 37-story office tower in Midtown Manhattan on Tuesday, prompting evacuations of nearby streets and buildings.

Construction crews have replaced emergency shoring with steel columns to better stabilize a midtown Manhattan office building against a partial collapse, the city buildings department said Thursday.

"As soon as we answer the emergency questions around safety in this moment we are going to be conducting a full investigation as to how we got to this point," Mamdani said at an unrelated press confer...