Rio declares force majeure on Boyne aluminium

The board of under-siege Mineral Resources faced grilling in Perth over a governance scandal, amid unexpected expressions of support.

The Canadian miner has reportedly engaged law firm Thomson Geer to finalize a prospectus for listing in the ASX before Christmas.

The three executives, including CEO Terry Holohan, were freed from detention on Wednesday.

The Australian Council of Superannuation Investors wants to clarify what directors knew about the company's investment in property that was part-owned by Chris Ellison.