IT specialists are currently trying to find out who posted the fake news.
The article, written in the Lithuanian and Russian languages, says that American troops in Latvia were poisoned with mustard gas and that mustard gas lying on the bottom of the Baltic Sea is "an ecological bomb" and "only the Kremlin knows when it will explode".
"The text was written as an obvious provocation. We suspect it was a cyber attack," said Vaidotas Beniusis, assistant director for contents at BNS.
The BNS data center in Estonia was targeted by a cyber attack in January.