A woman from the United States was among two persons who were killed and four others got injured when their car rammed into a bus in Aurai area of Muzaffarpur district on Monday, the police said. The car was taking two siblings from los Angeles and other passengers to neighbouring Sitamarhi district when the accident occurred on NH-77 at Kataujha bridge. Aziz Celin lucy, 28-year-old US national, and Pankaj Kumar died on the spot, while 4 others sustained injuries, including lucy's brother Jack Aziz, the police said.