Five residents of a six-story apartment building that partially collapsed in eastern Iowa remained unaccounted for, and authorities feared at least two of them might be stuck inside rubble that was too dangerous to search. The other three missing are not believed to have been in the building when it started collapsing three days ago. A group of people protested near the building on May 30, arguing the city was moving too quickly toward demolishing the 116-year-old brick and steel structure. After the partial collapse, the municipal government has announced plans to begin demolishing the unstable remains of the structure but delayed after a woman was found two days ago.