gunfire and explosions rocked the capital today. rebels say they re making substantial gains in their fight to seize the capital. reuters reports thousands of rebels were seen closing in on tripoli today. nato says moammar gadhafi s regime is, quote, crumbling. the libyan government denies the rebels are making any gains. but a government official who asked not to be named concedes that parts of the capital and its suburbs are no longer in government hands. in an audio address broadcast on state tv today, gadhafi vowed to fight until, quote, the last blood drops from every man and woman. a fierce gun battle broke out today near the hotel where many international journalists are staying. cnn s senior international correspondent matthew chance joins us live by phone from tripoli. matthew, you were in that very hotel. tell us more about what s happening around it. reporter: fredricka, it s a very bad line. i don t know whether you can hear me right now. it s more than just a