After the search for two workers was paused on Thursday after the deadly collapse of a seven story stairwell at a parking garage in Philly’s Grays Ferry section, officials said they are presumed dead. In an update on Thursday night, Philadelphia Mayor Cherelle Parker explained that crews sent in four highly trained dogs which found no signs of life on Thursday. Now efforts are switching from rescue to recovery, officials said. The mayor also said that they plan to demolish the parking garage at some point on Friday with city leaders explaining that the structure is still unstable. Also, on Thursday, NBC10 obtained video of the moment the building collapsed on Wednesday. On Thursday morning, workers at the nearby Grays Ferry Shopping Center were being turned away from work as police told NBC10’s Neil Fischer that the businesses there were closed. As of about 6:30 a.m. on Thursday morning, officials said a search operation for the two missing workers remained on hold after all seven levels of a stairwell collapsed in a parking garage that was under construction as part of a plan to expand employee parking for the Children’s Hospital of Philadelphia. The collapse killed at least one other person and injured two others, officials have said. Officials said the collapse occurred after a concrete segment failed while it was being installed. The garage’s construction has been a point of contention in the Grays Ferry community. Back in February, local residents protested the construction of the garage, claiming it would increase traffic congestion, harm the environment and affect public health. However, after the collapse on Wednesday, Philadelphia Mayor Cherelle Parker said the building had all the needed inspections and the project had all eight required permits for construction and they were all up to date. In fact, NBC10’s Investigators took a look at HSC Builders Construction Managers, the company tasked with this construction project, and did not find any major lawsuits or violations. The property currently has no violations either. A group of local residents that are opposed to the project held a vigil at the site on Thursday morning in honor of the workers who were killed or injured in the collapse. Also, on Thursday morning, Grays Ferry Avenue between 29 and 33rd streets remained closed with no timeline for reopening yet announced. Early Thursday, PAWS Philly, who have a shelter/clinic next door to the parking garage said that no animals were harmed in the collapse. But, the shelter was closed on Thursday and would remain closed until it is deemed safe to re-open. This is a breaking news story. It will be updated as new information becomes available. This story uses functionality that may not work in our app. Click here to open the story in your web browser. ...read more read less