NEW YORK — Looks like flour was the suspicious powder inside those envelopes sent to several United Nations missions.
A fifth foreign mission received an envelope with a suspicious white powder inside on Tuesday, WABC reported.
New York City police say the mission to the United Kingdom was the last to receive a letter. The German mission to the U.N. got a similar package earlier Tuesday.
Three other envelopes arrived Monday at the missions of France, Austria and Uzbekistan.
New York Police Department spokesman Paul Browne says tests revealed the substance contained in those three letters was flour. Test results are pending on the other two letters.
"I was scared," Lindsey Morrone, who works in the Manhattan office building that contains the British mission, told The Associated Press. "There were people in the office walking around with napkins over their faces, in fear that the spores could be spread through the ventilation system."
No one was hospitalized Monday night, but 43 people were decontaminated, officials said.
"Nobody's sick as far as we know," a high-ranking police source said. "This is a precautionary measure.
"The New York police did their work and did it well," said French U.N. Ambassador Gerard Araud. "There is a 99.9 percent chance that we are talking about a bad joke, but you have to be careful."
Several of the notes in the envelopes were reported to contain a single-line message of "al-Qaeda FBI in America," the New York Post reported. At least four of the envelopes had Dallas postmarks.
The incident is being looked into by the Joint Terrorism Task Force, which intends to determine if the envelopes contain any DNA, United Press International reported.
FBI spokesman Richard Kolko says his office is trying to locate the sender.