KHARTOUM, Sudan - The Sudanese government is reportedly doubling its bounty on the country's most wanted insurgent leader.

The move, reported by Sudanese state TV, comes in the wake of last weekend's surprise attack by Darfur rebels on the capital of Khartoum.

State TV says the government is now offering up to 500 million Sudanese pounds -- the equivalent of $246 million -- for the capture of Khalil Ibrahim.

The bounty on Ibrahim, who heads Darfur's powerful Justice and Equality Movement, is about 10 times the bounty the United States has put on Osama bin Laden.

Ibrahim's followers reached the outskirts of Khartoum on Saturday, after racing across the vast arid terrain of central Sudan with little obstruction to make it to the capital's doorstep.

The attack shocked the government, which is now conducting a full scale manhunt for Ibrahim and cracking down on other opposition figures.