Kristina Misiniene, head of the Center against Human Trafficking and Exploitation, said in a statement on Tuesday that the police had opened a pre-trial investigation into a possible long-term sexual abuse of a group of foreigners accommodated at the center.
"We confirm that such a pre-trial investigation is underway," Julija Samorovskaja, spokeswoman for Vilnius County Police, told BNS, but gave no details.
Giedrius Misutis, the spokesman for Lithuania's State Border Guard Service, told BNS that the man had been fired earlier in April.
"He was fired the same day the circumstances came to light. He was not an officer, but an employee who had only worked for two weeks under an employment contract," he said.
The spokesman said the psychologist had come to work at the Medininkai center from the Red Cross.
According to Misiniene's statement, the victims claim that the abuse took place both in their living quarters and in the counselling room.
Almost 4,200 irregular migrants, mostly from the Middle East and Africa, crossed into Lithuania from Belarus illegally last year. Lithuania and other Western countries accuse the Minsk regime of orchestrating the unprecedented migration influx, calling it "hybrid aggression".
After entering Lithuania, the migrants were initially accommodated in various places across the country and were later moved to five registration centers, which currently still house 2,797 people.