The leaders of the Liberal and New Democratic parties are expected to make their first campaign stops in Newfoundland and Labrador this weekend, with both focused on a battleground seat.

Liberal Leader Justin Trudeau and the NDP's Tom Mulcair will likely both be campaigning in St. John's South-Mount Pearl this weekend, with events scheduled just hours apart.

It's the first time since the campaign started six weeks ago that any party leader has scheduled a visit to Newfoundland and Labrador.

Liberal sources say Trudeau will visit the Avalon Peninsula for a campaign stop and rally on Sunday at Mount Pearl Senior High at 6 p.m.

He is expected to rally support for star candidate Seamus O'Regan, who hopes to take St. John's South-Mount Pearl from the New Democrats.

Mulcair will be campaigning in the area on Sunday, with an event planned at the Sheraton Hotel in downtown St. John's from 12 p.m. to 2 p.m.

Mulcair will be rallying for St. John's South-Mount Pearl incumbent Ryan Cleary, and will likely also support incumbent St. John's East MP Jack Harris.

There is no word yet on when Conservative Leader Stephen Harper or Green Party Leader Elizabeth May plan to touch down in the province.