The group, made up of Sweden's Lundin, Malaysia's Petronas, ONGC Videsh of India and Sudan's state-owned Sudapet, started exploratory work in Sudan's oil-rich heartland yesterday, said a spokesman.

"The drilling of Wan March-1 well marks a milestone for the first well to be drilled in the Nile swamp area," said the spokesman for the White Nile Petroleum Operating Company (WNPOC) that operates the plot for the four partners.

The