Sudanese President Omar Hassan al-Bashir, on the first day of a visit to EU candidate country Turkey, also accused Europe of backing the violence in Darfur.

The United States, the European Union and rights groups are unhappy with Bashir's visit, though Turkey insists it will press home the West's message that Sudan needs to work towards resolving the Darfur crisis.

"Mr. Hilal himself is a Sudanese citizen. He has a very influential personality in Darfur. He has contributed greatly to stability and security in the region," Bashir told a joint news conference with Turkish President Abdullah Gul.

"In Sudan we don't think the claims against Hilal are true. We absolutely do not believe them. The people who really commit murders in Darfur are receiving help from Europe and others."

Bashir's government has been criticised over a five-year-old conflict in western Sudan that has created what U.N. officials call the world's worst humanitarian crisis, with an estimated 200,000 dead and 2.5 million driven from their homes.

Mostly non-Arab rebels in Darfur took up arms in early 2003 accusing Sudan's central government of neglect. Khartoum mobilised mostly Arab tribes to quell the revolt.

Sudanese Federal Affairs Minister Abdel Basit Sabderat confirmed at the weekend that Hilal had been picked as his new adviser. The presidency had previously denied the appointment.

Washington says Hilal is the coordinator of the Janjaweed militias accused of war crimes in Darfur. He denies atrocities and says he mobilised his tribesmen to defend their lands after a government call to "popular defence".

PEACEFUL END TO CONFLICT

Gul, who looked uncomfortable during the news conference, said he had urged Bashir and other parties to seek a peaceful end to the conflict in Darfur.

A Turkish diplomat told Reuters Bashir had told Gul during their private talks that Hilal had been appointed to his new post in order to "engage him in the peace efforts".

Bashir's visit to Ankara and to Istanbul, Turkey's business hub, is expected to boost economic ties, though human rights groups have criticised Turkey for inviting Sudan's leader.

Despite the conflict in western Darfur, foreign investment has rocketed in Sudan's capital Khartoum.

Turkish firms have won large government construction contracts to build bridges and Sudan's first mall. They are also active in the clothing, furniture and steel sectors, and Gul said Turkey would build a 10,000 square metre industrial zone.