Lebanese militant group Hezbollah might be preparing a major terrorist attack against Israeli citizens residing or travelling to Bulgaria, it was reported Thursday.

According to Russian Israeli website IzRus, the information was unearthed by Bulgarian secret services, which promptly informed their Israeli colleagues.

The report adds that the alleged attacks were scheduled to coincide with the anniversary of the killing of Hezbollah leader Imad Mughnieh, who was liquidated Febuary 12, 2008.

In the past, Hezbollah has used this anniversary for staging attacks, and at present a supportive Iran has dramatically tense relations with Israel.

On its part, Israeli website Walla! writes that Israeli secret services have asked their Bulgarian counterparts to tighten the security for Israeli citizens in the country, many of whom come to Bulgaria for ski tourism during the winter.