"All intelligence details point to Kabuga being in Kenya," Jallow told reporters during a briefing in Arusha, Tanzania, where the United Nations tribunal is located.
Kabuga allegedly helped finance the 1994 genocide, which claimed the lives of 937,000 Tutsis and moderate Hutus, according to Rwandan government estimates. The United States government has offered a reward of up to US $5 million for information leading to his arrest.
Kenyan police spokesman Gideon Kibunja said on Friday that if the police knew where Kabuga was then they would arrest him. "Rather than make public statements it would be more useful if the prosecutor could present us with information," he said.
Jallow said he would head a delegation from the tribunal to meet Kenyan authorities later in September "to pursue the issue vigorously".
In the past, the government denied that Kabuga was in Kenya; the tribunal, on the other hand, says it has evidence that he moves between three Kenyan cities, Eldoret, Nairobi and Mombasa.
He allegedly uses various names and holds several passports.
Jallow said Kabuga owned businesses in Kenya and was in close contact with former leaders of the pro-Hutu government of the late Rwandan president Juvenal Habyarimana.
In 2005, investigators at the tribunal tracked him down in Nairobi but Jallow said he disappeared "mysteriously" after a tip-off.
With the tribunal set to complete its trials by 2008, Jallow said the court was negotiating with six countries to hold future trials elsewhere.
"We are on track with our exit strategy," he said.
Meanwhile, on Friday, the tribunal swore in a new ad Litem judge, Robert Fremr of the Czech Republic. He replaces Flavia Lattanzi of Italy.
The tribunal has made 29 judgments since it was established in 1994, with one more verdict expected before month-end. Trials are still under way for 27 other suspects.
[UN court to meet gov't on ultimatum over genocide suspects]
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