Conservative Leader Andrew Scheer plans to present new documents related to the SNC-Lavalin controversy this afternoon.
His announcement is set for 2 p.m. eastern time at the National Press Theatre in Ottawa.
A Saturday afternoon release from the Conservatives offers no more details, and party spokespeople did not immediately respond to a request for comment Sunday morning.
The Tories have been hammering Prime Minister Justin Trudeau over the SNC-Lavalin affair since the Globe and Mail first broke the story in early February.
Citing unnamed sources, the newspaper reported that aides in the PMO and others had pressured former attorney general Jody Wilson-Raybould to intervene in the prosecution of the Montreal-based engineering and construction giant.
The director of public prosecutions decided last fall not to negotiate a deferred-prosecution agreement with the company, which is facing charges of bribery related to business in Libya.
Wilson-Raybould later resigned from cabinet, claiming she had been removed from her post in a January shuffle because she wouldn’t bow to the pressure from Trudeau and others.
Last week, Trudeau expelled Wilson-Raybould and Jane Philpott from the Liberal caucus for what he described as breaking the bonds of trust with their fellow MPs over the government’s handling of the SNC-Lavalin affair.
