SOFIA (Reuters) - Bulgaria's deputy prime minister and labor minister, Ivailo Kalfin, resigned from his post on Tuesday after his center-left ABV party said it would withdraw its support from the center-right government.
Prime Minister Boiko Borisov has accepted his resignation.
Kalfin stepped down one hour after his party leadership said ABV would be ending its backing for the government over disagreements in the cabinet's overall policy and changes in the election code.
It will make its final decision at a party congress on Sunday.
ABV is not part of the ruling two-party coalition, but had declared its support for it and was given a minister's post as result.
The move will increase the instability of Borisov's minority government, which took office in October of 2014 on pledges to spur economic growth. It may be forced to seek broader support in parliament to stay in office.
(Reporting by Tsvetelia Tsolova; Editing by Angus MacSwan)