Mr Ibrahim said: “Nato attacked the city of Sirte with more than 30 rockets directed at the city’s main hotel and the Tamin building, which consists of more than 90 residential flats.
“The result is more than 354 dead and 89 still missing and almost 700 injured in one night.”
Meanwhile, Libya’s ruling National Transitional Council (NTC) forces have been regrouping after being repelled by pro-Gaddafi forces in Bani Walid on Friday.
Following hours of heavy fighting, the NTC men fled from the city, saying they had been ordered to retreat after facing stout resistance.
It was a major setback to a new government trying to exert its control over all of Libya and capture remaining bastions of the man who ruled it for 42 years.