"It is happening today. Action is being taken," he said, adding that searches were also being carried out at "private related companies," without revealing them.
The pre-trial investigation into "embezzlement" has been going on for a month, Jucevicius said, adding that the case is related to "millions." "We are mainly focusing on embezzlement at the LFF. (...) We are speaking about millions but I cannot reveal specific figure," the FCIS chief said. No suspicions have been brought yet, he said.
Earlier this week, Lithuanian Prime Minister Algirdas Butkevicius said he would ask the country's Department of Physical Education and Sports to carry out an investigation into the situation at the Lithuanian Football Federation after the Seimas opposition called for stopping funding for the LFF due to alleged influence of the criminal world.
"The prime minister will order the Department of Physical Education and Sports to analyze the situation at the Lithuanian Football Federation and then will make a decision on funding," Evelina Butkute–Lazdauskiene, spokeswoman for the prime minister, told BNS on Tuesday.
The move comes in response to the opposition Liberals' call for stopping funding for the LFF "until the federation elects heads with a transparent reputation."
The Liberal Movements' leaders Eligijus Masiulis said he proposed taking such measures in response to reports that criminal groups might be fighting for the LFF management.
Raimondas Karpavicius, a former member of FK Atlantas Klaipeda and a member of the initiative group Futbolo Sajudis (The Revival of Football), claimed last week that the LFF activity "is based on intimidation" and petty gifts and that the country's top A league was degrading due to pre-agreed games and various intrigues.
He also claimed that heads of regional football federations are influenced by criminal groups who openly boast about their family ties with Kvedaras. According to Karpavicus, UEFA allocates up to EUR 20 million to the LFF but the public do not know how the money is spent.
Meanwhile the Kvedaras-led LFF turned to prosecutors on Tuesday in response to such claims, saying that they "do damage to the reputation of the LFF, its head and the country's whole football."
The LFF is scheduled to elect its new president in early 2016.
Lithuania's national football team is currently the 126th in the FIFA World Ranking.