Spread This NewsBloomberg South Africa’s parliament approved a key piece of budget legislation despite objections from the second-biggest party in the coalition government, raising the risk of the alliance unravelling.

South African opposition party the Economic Freedom Fighters has written to the speaker of parliament seeking to block lawmakers from meeting on Wednesday to vote on the next stage of the budget process.

South Africa’s fragile unity government has been shaken again. The country’s second-largest political party broke with partners Wednesday and voted against a national budget.