According to a new report released by Lithuania’s intelligence service said on Monday, Russia has upgraded its military presence in the region, permitting them to launch an attack on the Baltic states with as little as twenty-four hours’ notice, meaning even the recently upgraded NATO countermeasures may no longer be sufficient to engage or repel a Russian invasion.

Lithuania, Latvia, and Estonia were all annexed by the Soviet Union in the 1940s, but following its fall in the early 90’s, each of the three nations became members of both NATO and the European Union.  They have each also grown increasingly nervous about the possibility of history repeating itself since Russia militarily annexed Crimea from the Ukraine in 2014, and NATO had been placing thousands of troops throughout Europe’s Eastern border with Russia for just such a possibility.

Lithuania produces annual reports on the state of the Russian threat to their nation and the surrounding region, but this year’s report came with a foreboding warning: Russia has been amassing troops and equipment in the Kalingrand region since last year’s report was filed – making the lead time necessary for a Russian attack significantly shorter than that of any NATO response that could currently be mounted.

Included among the recent Russian upgrades are Su-30 fighter aircraft and missile systems that could place any ships in the Baltic Sea directly in Russian crosshairs.

“This is a signal to NATO to improve its decision speed,” Lithuanian Defence Minister Raimundas Karoblis told reporters on the sidelines of the presentation of the report. “NATO’s reaction time is not as fast as we would like it to be.”

NATO is actively deploying forces of around 1,000 troops to each of the Baltic states and to Poland, in addition to U.S. troops that have already arrived in the region.  These moves were made prior to the release of Monday’s report, and were hoped to provide a sufficient presence to respond rapidly to any potential Russian incursion.  According to Lithuania’s intelligence service, however, the new troop placements may not be enough.

“The force is adequate in the short-term, but in the medium-term perspective we would like more capability, and not only land troops but also air defenses and capabilities to counter any blockade,” Karoblis said.

In addition to a larger Russian presence near the border, they have also actively been monitoring and suppressing radio frequencies used by NATO pilots over the Baltic Sea – the same waterway new missile placements are intended to offer strike capability over.  According to the report, commercial and scientific ships out of Russia are also being used throughout the Baltic to conduct surveillance on troop movements and equipment deployed by NATO.