While more suspicious white powder was recovered from the Russian Mission earlier today, a letter mailed to the Lithuanian Mission without any powder has been deemed legitimate, and not related to other incidents at foreign missions.
Earlier today, police got a call of a suspicious package at 67th Street and Third Avenue, the Russian Mission. Initial tests show the substance is not harmful.
The United States Post Office confirms the letter was sent from Texas, and fits the same pattern as the other letters found this week.
Investigators say the suspicious powder mailed to three United Nations missions earlier this week was plain flour.
White powder was found in envelopes at two more missions yesterday. The powder in envelopes sent to the British and German missions is still being tested.
The letters were postmarked in Dallas, as were the three letters that were received at missions on Monday.
Workers who handled letters at the Consulate General of Uzbekistan, as well as the French and Austrian missions were decontaminated as a precaution Monday.
Three of the five envelopes received this week contained letters referring to al-Qaida and the FBI.
Police Commissioner Ray Kelly said it appears to be a case of harassment instead of terrorism.
"They're coming from Texas, basically the Dallas, Texas area. Some of them have statements which says al-Qaida, FBI, America," said Kelly.
He also said the diplomatic community has been alerted to look for suspicious mail, to not touch it, and to call the authorities.
Envelope were also received by the Missions for Lithuania and Belarus today, but they turned out to be unconnected.