New York - A woman who had lost her husband in the September 11, 2001 terror attacks on the World Trade Center was among those killed in the late Thursday air crash in New York state, her sister said early Friday.

"We know that she was on that plane," Sue Bourque was quoted by the Buffalo News as saying about her sister Beverly Eckert, who had been waiting at Buffalo airport to pick her sister up when the Continental Airlines plane crashed some 10 kilometres away.

"And now she is with him," she added, referring to her sister's husband who was among the some 3,000 killed in the twin airplane attacks on the WTC towers.

Eckert was co-chairwoman of Voices of Sept. 11, a group pushing for a formal commission to investigate intelligence failures before the terror attacks and for a proper memorial to the victims. (dpa)