Norrmalm police said on Tuesday morning that they had yet to verify the contents of the two bottles taken the day before, reported Dagens Nyheter.
A bomb threat was sent to different Swedish media outlets Monday. The extreme left-wing group Global Intifada claimed responsibility for the threat.
The reason, said Global Intifada, was that FMV "actively buys weapons and military equipment from Israel".
Police cordoned off areas of Östermalm and removed two suspicious bottles found near the FMV building.
“When personnel at FMV began looking around in the area, these bottles were found,” said Kjell Lindgren, police spokesman. “They don’t seem to be normal bottles.”
The mysterious bottles were taken away for further investigation.