OTTAWA — A Canadian minister’s sudden resignation on Tuesday turned vague allegations of interference in the criminal prosecution of an engineering giant into a deepening political crisis for Prime Minister Justin Trudeau’s Liberals.

Jody Wilson-Raybould’s resignation followed a chorus of demands for the government to come clean about whether Trudeau’s office had pressured her to intervene in the prosecution of SNC-Lavalin.

The Montreal-based firm was charged in 2015 with corruption for allegedly bribing officials in Libya between 2001 and 2011 to secure government contracts during former strongman Moamer Kadhafi’s reign.

Jody Wilson-Raybould, who was Canada’s first indigenous attorney general and justice minister prior to being shuffled to another post last month, announced on Twitter that "with a heavy heart" she was leaving the cabinet.

Trudeau said he was "surprised and disappointed".

"Our government did its job properly and according to all the rules," he said, while upbraiding his former attorney general, if she felt otherwise, for not bringing her concerns to him directly.

SNC-Lavalin lobbied the government, including senior officials in Trudeau’s office, for an out-of-court settlement that would include paying a fine and agreeing to put in place compliance measures.

A possible guilty verdict at trial, they argued, risked crippling its business and putting thousands out of work.

But according to unnamed sources cited by the Globe and Mail, Wilson-Raybould refused to ask prosecutors to settle with the company, and the trial is set to proceed.

Trudeau has denied the allegations, saying: "At no time did I or my office direct the current or previous attorney general to make any particular decision in this matter."

Opposition parties, however, pressed for clarity.

And on Monday the independent ethics commissioner launched an investigation -- the second into a prime minister first elected in 2015 on a promise to clean up corruption, and with only eight months before the next ballot. 

’Trying to hide the truth’

While the controversy snowballed, Wilson-Raybould declined to speak, citing solicitor-client privilege and cabinet confidentiality.

"I am aware that many Canadians wish for me (to) speak on matters that have been in the media over the last week," she said in a statement.

"I am in the process of obtaining advice on the topics that I am legally permitted to discuss in this matter," she said, adding that she retained a retired Supreme Court justice as legal counsel.

Conservative leader Andrew Scheer reacted to her resignation by saying Trudeau’s "ethical lapses and his disastrous handling of this latest scandal have thrown his government into chaos."

He also accused the prime minister of "trying to hide the truth with regards to the SNC-Lavalin affair."

The Canadian charges against SNC-Lavalin were just the latest blow to one of the world’s largest construction and engineering firms, after its former president and senior executives were accused of fraud, and the World Bank banned it from bidding on projects until 2023 due to "misconduct" in Bangladesh and Cambodia. — AFP