Building collapse kills three, prompts demolition and investigation in Iowa city

Demolition crews have begun dismantling the remains of an apartment building that partially collapsed in Davenport, Iowa, killing three people.
The city hired outside firms to investigate the collapse, with findings to be released when appropriate.
Concerns had been raised about the building's safety from various groups prior to the collapse.
Lawsuits have been filed accusing the city and building owner of neglecting residents' safety.
Clearing the site is expected to take several weeks due to hazardous materials like asbestos.