By Terence Smith Special to The New York Times
April 1, 1970
SAIGON, South Vietnam, Wednesday, April 1—The South Vietnamese Army’s penetration of Cambodian territory last week has caused considerable concern among United States diplomats here.
Senior members of the Unit ed States mission are worried that if the South Vietnamese continue to conduct sweeps across the Cambodian border, they will threaten the neutral ity of the new regime in Pnom penh and complicate American efforts to stay out of the Cam bodian crisis.
On the other hand, the South Vietnamese appear eager to ex ploit the changing situation.