Six people were killed and another two were seriously injured after a minibus they took fell off a cliff in central China\'s Hubei Province on Saturday evening, local authorities said.The accident happened at about 6:20 p.m. in Shimen Village, Xingshan County, Yichang City, when the minibus plunged the 100-meter-deep cliff in heavy rain, according to the Yichang municipal fire-fighting department.Fire-fighters arrived at the scene at about 7 p.m. and are still working at the site.