A fight early Sunday morning between rival gangs left six people with stab wounds. Police say two rival Mexican gangs, one from Yonkers and the other from White Plains, had an argument that quickly turned violent. Witnesses say the fight began inside the Guadalahara Di Noche nightclub on Nepperhan Avenue and spilled out into the street when security ejected several gang members. Cops say the members were chasing each other and throwing rocks, when they pulled out knives and started stabbing each other. Police say six people were stabbed and four of them are in bad shape at local hospitals. Police have not yet made any arrests.