The NATO airbase in the German city of Geilenkirchen remains on high alert, a spokesperson announced, quoted by "Reuters", quoted by News.bg.
The security level was raised last night "based on intelligence indicating a potential threat".
"We are still in 'Charlie'," explained a base spokesman, referring to the second highest of the four alert levels.
The security level "Charlie" means "an incident has occurred or intelligence has been received that some form of terrorist action against NATO organizations or personnel is highly likely.
The spokesman said the base, which houses NATO's fleet of AWACS surveillance aircraft, was operating with minimal staffing as a precaution as operations continued as planned.
It was said to be unrelated to the incident last week, when security at the base was briefly raised as a military base in the nearby city of Cologne investigated suspected sabotage of the water supply.
On the same day, the Geilenkirchen base also reported an incident of attempted break-in, which necessitated a full search of the premises.
Regarding the alleged sabotage at the Cologne base, the German military later clarified that test results showed that the tap water was not contaminated.
In the past, the Alliance has warned of a campaign of hostile activities organized by Russia, including sabotage and cyber attacks. In turn, Moscow regularly accuses NATO of threatening its security.
In June, NATO Secretary General Jens Stoltenberg said the alliance was seeing a pattern developing and that the latest attacks were the result of more active Russian intelligence.
In recent years, several incidents on NATO territory have been treated as suspicious by analysts, including the 2022 disruption of a key submarine cable connecting Svalbard to mainland Norway.