The Liberals appear to have held on to the federal Markham-Thornhill riding with CBC's decision desk projecting that Mary Ng has won Monday's byelection.

Former federal Immigration, Refugees and Citizenship Minister John McCallum vacated the seat in February to become Canada's ambassador to China. 

The riding was first created in 2015.

Before then, McCallum held the nearby Markham-Unionville riding for 16 years. The redrawn boundaries of the Markham-Unionville riding, however, saw the riding go Conservative in the 2015 federal election.

The race for McCallum's vacant seat was one of five byelections held around the country Monday. Early results suggested that three ridings would go to the Liberals, while two others would go to the Conservatives.