31.   At least four western embassies received envelopes containing threatening letters and a white powdery substance this week.

32.   One vessel of a white substance splashed against the carriage but was quickly wiped off.

33.   Separately, one source said that when it was opened, a powdery white substance fell out.

34.   South African Airways has grounded two planes after a white powdery substance was discovered on the aircraft, the airline said Friday.

35.   The Daschle letter contained a white powdery substance and threatening letter.

36.   The first anthrax scare hit the island was on Friday, when the U.S and Australian embassies received mail containing a white powdery substance.

37.   The Indian High Commission received three letters containing a white substance, but only one was opened, said an embassy official who refused to be named.

38.   The warning came as Health Minister Bernard Kouchner confirmed that cultures taken on white powdery substances sent to address in the Paris region were all negative.

39.   The warning came as Health Minister Bernard Kouchner confirmed that cultures taken on white powdery substances sent to addresses in the Paris region were all negative.

40.   Mouldy rice, coated with white substances to make it appear normal but which contained potential carcinogens were found in the southern province of Guangdong.