Witnesses in Tripoli and Benghazi report on tumult ; CNN ca n't confirm their accounts . Masked men blasted pro-government music and fired guns in Tripoli , witnesses say . Anti-government protesters set fire to cars and attacked a military base in Benghazi . The Libyan army is trying to retake the city from rebels who have taken over parts of it since last week.
Witnesses in Tripoli and Benghazi report on tumult ; CNN ca n't confirm their accounts . Masked men blasted pro-government music and fired guns in Tripoli , witnesses say . Anti-government protesters set fire to cars and attacked a military base in Benghazi . Moammar Gadhafi 's son claims the media overstates the violence , blames outsiders .