According to reports, a gas explosion occurred in the ventilation shaft connected to the boiler in the building. A building partially collapsed on Wednesday morning in the Mott Haven section of the Bronx, with reports of a gas explosion in the ventilation shaft connected to the boiler in the building, the FDNY said. According to reports, there was a gas explosion in the incinerator shaft of the building. Adams presser on the situationWhat they're saying:New York City Mayor Eric Adams held a presser at 11 a.m. covering the situation. The backstory:Incinerator shafts in New York City buildings were once used to dispose of trash, which was then burned on site.