Helen Zille: There's a crisis in Parliament

The DA leader says the National Assembly is being used as an instrument of Luthuli House.

FILE. The DA leader says the National Assembly is being used as an instrument of Luthuli House. Picture: AFP.

CAPE TOWN - Democratic Alliance (DA) leader Helen Zille says opposition parties are united in their insistence President Jacob Zuma and the executive be held accountable for the Nkandla spending scandal.

The Western Cape Premier says there's a crisis in Parliament because the house is being used as an instrument of Luthuli House.

National Assembly speaker Baleka Mbete again lost control of the house on Thursday night, when opposition parties clashed during a debate on the Nkandla ad-hoc committee's report.

The committee found that President Jacob Zuma is not responsible for the overspending on upgrades to his KwaZulu-Natal home.

WATCH: Mbete reacts to Parliament chaos

Zille says members of her party stuck to the rules of Parliament in responding to Mbete.

She says Mbete plays loose with the rules of Parliament and opposition parties had to challenge her behaviour.

"All opposition parties are united on the question of accountability. Leaders can't do what they like; they can't spend taxpayer's money as and how they like."

The DA leader says Parliament is failing in its oversight duties.

WATCH: What the 'hell'? Deputy speaker puts his foot in it

During the debate an Economic Freedom Fighters (EFF) Member of Parliament (MP), who refused to withdraw her remarks that Zuma was a thief and a criminal, was hauled out of the chamber by police.