Under the law, they will remain in office until parliament is formally briefed about the resignations.
The Civic List (GL) has already left the ruling coalition, so Jansa's cabinet now has only 36 seats in the 90-seat parliament. The Slovenian Popular Party (SPS) has announced that it will leave the coalition as well, and intensive negotiations are under way to shape a new majority that would form an interim government.
Erjavec said he had talked with Alenka Bratusek, a potential prime minister designate nominated by Positive Slovenia, a party she runs after founder Zoran Jankovic withdrew from politics over a corruption scandal.
The DESUS executive committee will decide on Monday whether the party will be part of Bratusek's interim government but it is clear that its MPs will vote for her appointment as prime minister designate, Erjavec said.
The GL and the Social Democrats (SD) have agreed in principle to vote for Bratusek and parliament could appoint her in early March. In that case, she would have two weeks to nominate her ministers and the Jansa cabinet would be only a caretaker government.
SD president Igor Luksic said today he would support Bratusek as prime minister designate, adding that this was a step forward towards solving the political crisis in the country.
SPS vice president Franc Bogovic said this party would leave the ruling coalition on Monday, when he will resign as agriculture minister, as will party president Radovan Zerjav as economy minister.
Bogovic said the SPS would not join the parties which wanted to form an interim government but that it wanted the formation of a caretaker government with a clear mandate and a date for early elections.
The ruling coalition will then comprise only Jansa's Slovenian Democratic Party and New Slovenia and have 30 seats in parliament.
Regardless of the outcome of the crisis, one of the three priorities for all incumbent parliamentary parties is the ratification of Croatia's European Union accession treaty so that the country can join on July 1 as scheduled.