The eldest son of Libyan leader Moamer Gaddafi was not hurt in an exchange of fire between his guards and rebels besieging his house in the capital, Tripoli, the head of the rebel Transitional National Council, Mustafa Abdel Jalil, said, dpa reported.
"Neither Mohamed Moamer Gaddafi nor any one of his family was harmed," Abdel Jalil told the broadcaster Al Jazeera.
"He will remain in his house, and I guarantee his safety," Abdel Jalil said.
Mohamed Gaddafi was speaking by telephone with the news channel hours after rebels swept across Tripoli. Gunfire was heard during the interview, and contact was disrupted.
He is the son of Moamer Gaddafi from an ex-wife. The rebels said they had arrested his half-brother Seif al-Islam.
There were no confirmed reports about the fate or whereabouts of other members of the Gaddafi family.
Meanwhile, rebels said they controlled key installations in Tripoli, including the state radio and television building, after a quick collapse of the Gaddafi regime.
Their move into Tripoli capped six months of an armed conflict against the government of Moamer Gaddafi, who ruled the country for 42 years.