Aim-listed exploration company Sable Mining Africa says it cannot comment on the situation regarding the indictment of its CEO Andrew Groves by a grand jury in Liberia, last month, in relation to a corruption investigation. President Ellen Johnson Sirleaf last month ordered an inquiry into London Aim-listed Sable’s unsuccessful attempt to acquire an iron-ore concession in northern Liberia, after watchdog group Global Witness accused the company of “bribery and using dirty tricks”.