Libya: Gaddafi's son Muhammad captured
22 August 2011 Last updated at 07:38 BST
Col Muammar Gaddafi's son Muhammad was giving a phone interview to Al Jazeera television, confirming that he was under house arrest, when gunfire broke out and the line cut off.
The head of the National Transitional Council later told the television station that Muhammad Gaddafi was unhurt in the incident.
Libyan rebels moved into central Tripoli after a day of heavy fighting in and around the capital, reportedly also capturing Col Gaddafi's prominent son Saif al-Islam.
US President Barack Obama said the Gaddafi regime had reached a "tipping point" and the UK said the end was near for the Libyan leader, and urged him to go.