Libyan National Transitional Council head Mustafa Abdul Jalil said the Council's delegation will pay a visit to Niger on Sept. 16 with a view to return the Gaddafi supporters, who fled to this country, Al Jazeera TV channel reported.
Niger says that Saadi Gaddafi, one of the sons of fugitive Libyan leader Col Muammar Gaddafi, has arrived in the capital, Niamey.
Saadi Gaddafi crossed the border from Libya over the weekend and was granted refuge, officials in Niger confirmed.
The whereabouts of Col Gaddafi remain unknown. He has said he will die rather than flee Libya.
Saadi Gaddafi is reported to have been flown to Niamey on a military transport plane from the northern town of Agadez.
A source in Niger told AFP news agency that he was in the "safe custody" of Niger security forces in Niamey.
The source said he had previously been staying at a residence of the governor of Agadez.
So far 32 members of Col Gaddafi's inner circle - including three generals - have entered Niger this month.
Reports say the generals have applied for political asylum but it is not clear if Saadi Gaddafi has done so too.