Canadian Prime Minister Justin Trudeau is expected to announce his resignation amid increasing pressure from his Liberal party, according to reports.

Canadian Prime Minister Justin Trudeau is expected to announce as early as Monday that he will step down as leader of the ruling Liberal Party, Canadian media reports, ahead of a general election to be held later this year that he is widely expected to lose.

Trudeau's departure would leave the party without a permanent head at a time when polls show the Liberals will "badly lose" to the official opposition Conservatives in an election that must be held by late October.