The ministry has advised Slovenian travellers to avoid high-risk locations and follow media reports and instructions from local security bodies.

The alert was issued after the US shut down its diplomatic missions in the Middle East and North Africa based on information it had obtained of a potentially imminent terror threat.

The US also released a worldwide travel alert last week in which it highlights "the continued potential for terrorist attacks, particularly in the Middle East and North Africa, and possibly occurring in or emanating from the Arabian Peninsula".

Like the US, Slovenia has called on its citizens to be vigilant and highlighted the potential for attacks on targets such as government and military buildings, transport infrastructure and tourist sites.

"The risk of becoming a victim of a terrorist attack in nevertheless still much smaller than other risks associated with travel abroad, including accidents, illnesses and crime," the ministry added.

The Foreign Ministry also announced it was not closing any of the country's diplomatic missions abroad. The only embassy operated by Slovenia in the area where the US has closed its diplomatic posts is in Cairo.

The ministry has previously issued a travel warning for Egypt, advising against non-essential travel to most of Egypt due to the mounting political unrest there.

It reiterated this advice in yesterday's alert, saying that "some areas could remain dangerous, which is why non-essential travel there...is not advised".

According to the ministry, the Red Sea tourist resorts such as Sharm El Sheik, Daham and Hurghada remain safe for the time being and are not subject to the travel warning, although it called on tourists to keep abreast with the latest information.