Prosecutors questioned Friday the speaker of Ivory Coast's national assembly, Mamadou Koulibaly, as part of a nepotism and embezzlement probe against the country's interior minister. Following two hours of questioning by Abidjan prosecutors, Koulibaly told journalists that 'we need to make an effort to see clearly into several matters.' President Laurent Gbagbo ordered on Sunday that prosecutors probe his interior minister, Desire Tagro, following allegations made by Koulibaly and various media at the start of June. Tagro is accused of favouring people from his region for places at a police training school and embezzling money set aside for the Hajj pilgrimage to Mecca. The inquiry will also look into accusations that Tagro embezzled money paid to the state by the company Trafigura as compensation for the victims of toxic waste dumped in Abidjan in 2006. Opposition parties have charged that Gbagbo is seeking to sabotage the electoral process with the corruption probe, as well as ensnare Prime Minister Guillaume Soro, who formerly led rebel troops. The opposition parties have also called for a parliamentary probe into Tagro's activities, which Koulibaly, a senior member of the president's party, said Gbagbo has not expressly ruled out and would be considered by party leaders on Tuesday. 