The foreign minister of Lithuania, Vygaudas Usackas, resigned Thursday one day after President Dalia Grybauskaite announced that she had lost confidence in him, DPA reported.
"I am announcing my resignation. I have signed my resignation (letter) and will hand it to the prime minister later today," Usackas told a press conference.
Usackas refused to comment on his future plans and said he had yet to hear a concrete reason why the president had called for his dismissal.
President Dalia Grybauskaite on Wednesday urged Prime Minister Andrius Kubilius to take "specific procedural steps for the dismissal of the foreign minister."
Tension had been growing between Grybauskaite and Usackas for several weeks over a range of issues.
A rift opened between the two over the handling of the recall of Lithuania's ambassador to Georgia, whom Grybauskaite accused of becoming politicised.
They were also at loggerheads over interpretations of a parliamentary probe into a possible secret CIA prison in Lithuania, with the president suggesting the facility probably did exist and the foreign minister saying it did not.
Usackas served as foreign minister since the Kubilius government formed its cabinet on December 4 2008.