Libyan officials say 15 civilians, including three children, were killed in a NATO attack on a building west of the capital, Tripoli.
The alliance acknowledged its warplanes hit the town of Sorman, but insisted the target was military.
Reporters were shown a destroyed country estate belonging to Khuwildi Hemidi, a member of the Libyan Revolutionary Command Center, the inner circle of government.
Reporters were also taken to a hospital, where an AFP correspondent saw nine bodies and body parts.
The Libyan claim of civilian deaths came just hours after NATO acknowledged that a "weapons failure" may have led to civilian casualties in a residential neighborhood of Tripoli.
Reporters were shown the bodies of five of the nine people Libyan officials said were killed in that strike.
compiled from agency reports