SUDBURY, Ontario,  (Reuters) – Canada’s main  opposition Liberal Party yesterday vowed to bring down the  minority Conservative government, leaving the fate of Prime  Minister Stephen Harper in the hands of other parties.

In a risky announcement that offers no guarantee of  electoral success, Liberal leader Michael Ignatieff said Harper  had failed to help Canadians deal with economic crisis.

“The Liberal Party cannot support this government any  further. We will hold Stephen Harper to account. We will oppose  his government in Parliament,” he told cheering members of the  Liberal Parliamentary caucus in Sudbury, Ontario.

The Liberals now want to bring in a non-confidence motion  in the government once Parliament resumes later this month.

Provided all three opposition parties vote against the  government, that would mean an election in late October or  early November, a year after the last federal election.

The left-leaning opposition New Democrats, who have  repeatedly said they will oppose Harper, took a cautious line.

“We’re going to wait and see exactly what the Liberals are  going to table. We’re not going to jump in and speculate as to  how we’ll go,” New Democrats national director Brad Lavigne  told the Canadian Broadcasting Corp.

The leader of the separatist Bloc Quebecois — no friend of  Harper — will react to Ignatieff’s announcement at 4 p.m. EDT  (2000 GMT) today.

Polls show the Liberals and Conservatives deadlocked at  around 32 percent support, well below the 40 percent needed to  guarantee a majority in the 308-seat House of Commons.