SINGAPORE -- Four sets of investors, including a consortium led by a former chairman of budget carrier AirAsia Group, have come forward with offers to rescue Malaysia Airlines, according to local media reports. The troubled carrier is now undergoing rehabilitation, and the Malaysian government hopes to accelerate this process with an injection of funds. The prospects remain hazy, however, as Prime Minister Mahathir Mohamad has pledged he would not allow the airline to fire workers. Mahathir told reporters there were offers from four groups of investors, with many Malaysian companies among them.