The condo owners have been displaced by the blaze.
The fluid was coming from a body in the unit above, the residents claim.
The suspected shooter is in custody.
The fire happened very early Tuesday morning.
The rent includes utilities, and the apartments are mostly furnished.
The City Club Apartments building opened this week in Minneapolis.
It happened at Lowry and Colfax avenues in north Minneapolis.
The FBI is now investigating how the toxic substance came to be in the building.
It's unclear what led to her falling.
No surprises there.