OTTAWA -- The NDP says Tom Mulcair will take part in a bilingual election debate sponsored by the Munk Debates in Toronto.

The party leader has been selective about debates, saying he will only take part in those that include Prime Minister Stephen Harper. Mulcair said last week his team was weighing about two dozen debate proposals and promised a decision by Monday.

With Mulcair's announcement a day late that he had agreed to the Sept. 28 Munk debate on foreign affairs, all three major party leaders had signed on to participate.

Harper agreed to the Munk debate earlier. The Liberals said leader Justin Trudeau would also participate in the debate, but are asking that Elizabeth May be included as well.

The Green party leader was not invited, despite her well-received participation in the first election debate.

Trudeau has said the more debates, the better.

In addition to requiring Harper's presence, Mulcair has also said one of his debate conditions is that there be an equal number in English and French.

Harper, for his part, has rejected the traditional debates run by a consortium of the major broadcasters. He has agreed to a Sept. 17 Calgary debate sponsored by the Globe and Mail and Google Canada and a French-language debate on Quebec's TVA network on Oct. 2.