Costa Rica will not be required to compensate mining company Infinito Gold for the cancellation of the Crucitas mining project, the International Centre for Settlement of Investment Disputes ruled

The Costa Rican congress banned open pit mining in 2010, shortly after the termination of Infinito Gold's contract at Crucitas.

A judge declared that the statute of limitations for bringing Arias to trial had passed.

Operation Lapa-1 took place in late January to help restore order in Crucitas.

Last August, Chief Prosecutor Emilia Navas presented criminal charges against Arias for breach of duty.

The study warned of a "very probable" and "significant" affectation of aquatic ecosystems at Crucitas, which has been contaminated by mercury used by illegal mining groups to extract gold from the area.

Chief Prosecutor Emilia Navas has presented criminal charges against former President and Nobel Peace prize winner Oscar Arias for breach of duty.

Arias, president from 1986 to 1990 and again between 2006 and 2010, said on his Facebook page that he would comply with the prosecutors' request.

Canadian mining firm Infinito Gold announced last week that it has secured funding from a lender to continue pursuing damages stemming from Costa Rica's cancellation of the firm's gold mining concession in 2011.

An appeals court called for a new trial against former Environment Minister Roberto Dobles for approving the controversial Infinito Gold mining project.