NEW : Mortar rounds land in Misrata clinic , causing casualties . The airstrikes hit several rebel vehicles , reports say . The dictator 's forces , however , still outnumber rebels by about 10 to 1 in terms of armor and other ground forces , according to Navy Adm. Mike Mullen , the Joint Chiefs of Staff chairman . A government spokesman says the rebels are not serious about a cease - fire . An opposition leader calls for the use of snipers , artillery and tanks .
NEW : Mortar rounds land in Misrata clinic , causing casualties . The airstrikes hit several rebel vehicles , reports say . A government spokesman says the rebels are not serious about a cease - fire . An opposition leader calls for the use of snipers , artillery and tanks .