are unaccounted for after the collapse overnight of a 12-storey residential building north of Miami, Florida, officials say. The number of these not yet located has risen from 51 to 99, Miami-Dade police say, with 53 now accounted for. It is unclear what number of people were within the building at the time. The complex within the town of Surfside was in-built 1980. Out of 130 units, about half were littered with the collapse. A number of occupier migrants are reported missing by their consulates. Rescuers pulled 35 people from the wreckage, officials said. Ten were assessed and treated, of whom two were sent to the hospital. The back of the building, probably a 3rd or more, is completely pancaked,” Surfside Mayor Charles Burkett told a press conference. Florida Governor Ron DeSantis, who visited the location on Thursday afternoon, said the hearth and rescue service was still in “search and rescue mode”. “The TV doesn’t love justice. it’s really, really traumatic to determine the collapse of an enormous structure like that,” he said. A community centre in Surfside has been changed into a family reunification centre and an information point for concerned relatives. President Joe Biden said he was expecting Mr DeSantis to declare an emergency and officials from the Federal Emergency Management Agency (Fema) were already at the scene. “I tell the people of Florida, whatever facilitates your want, what the federal can provide, we’re waiting, just ask us. We’ll be there,” Mr Biden said. ‘It gave the impression of something from 9/11’ Police gave the building’s location as 8777 Collins Avenue, the address of the 12-storey Champlain Towers. town of Surfside runs along Collins Avenue, north of city limits. One man who was out along with his brothers walking their dog described hearing the building come down. “Basically we heard a very big rumble and that we thought it absolutely was a bike, you know, and that we turned and saw a cloud of dust just coming our way,” he told CBS Miami. “We were like – ‘what goes on?’ We went rushing toward it with shirts over our faces and also the watchman came out and that we were, like, ‘what happened?’ and she or he said the building collapsed.” A man who witnessed the aftermath of the collapse told CNN, “It seemed like something from 9/11,” concerning the attacks that brought down the dual Towers in big apple in 2001. Santo Mejia, 50, was woken when his wife called from a unit on the ninth floor of 1 of the three buildings that frame Champlain Towers. She is an overnight caretaker for an elderly disabled woman. “She said she heard a giant explosion,” Mr Mejil told the Miami Herald. “It felt like an earthquake.” His wife was among those rescued. Relatives of the primary lady of Paraguay are among the missing, Paraguayan officials said. Rescuers were unable to contact the sister and brother-in-law of first lady Silvana López Moreira, together with their three children and a domestic worker. A man who lives in a very neighbouring building described what happened for CBS: “The building shook so I looked out the window and you could not see, I assumed it had been sort of a storm or something coming in. “When the dust cleared, the rear two-thirds of the building was gone, it had been all the way down to the bottom.”