(CNN) — One more person was rescued overnight after a six-story apartment building partially collapsed in Davenport, Iowa, the city’s fire marshal said Monday morning as search dog teams continued to search for someone. that he might still be trapped inside.
“No one is known to have been trapped in the building,” Chief Mike Carlsten said, adding that no fatalities have been reported.
However, “the building is not structurally sound and poses a risk to response teams,” he said, adding that structural engineers are on site as first responders prepare to switch from rescue operations to of recovery.
It is not clear how many people may be unaccounted for or how many residents are displaced.
Seven people were previously rescued and more than a dozen escorted out of the building, known as The Davenport, after part of its rear section collapsed on Sunday and detached from the rest of the structure, Carlsten said last night.
The cause of the collapse has not yet been determined. The building’s owners had permits in place to repair the exterior wall, said Richard Oswald, the city’s director of neighborhood services.
“This is an active scene, we’re going to keep working, keep evaluating, and for the full purpose of trying to find the people and trying to get them out,” Davenport Mayor Mike Matson said at a news conference Sunday by the night.
Once on the scene, emergency teams detected a large natural gas and water leak on each floor of the building, according to authorities. Public services have been secured and rescue teams are resuming their search for people whose whereabouts are unknown.
“I live in the building right next to it, and we heard like a big bang,” Andrew Sommer, a former tenant of The Davenport, told CNN affiliate KWQC. “Shortly after, we came out and saw that the entire section of the building was gone.”
The person rescued overnight was taken to a hospital, Carlsten said Monday.
Crews were dispatched to the scene around 4:55 p.m. local time Sunday, Carlsten said. The area will remain closed while the search and investigation work continues.