​Ontario's Liberals have nominated a candidate for a provincial byelection in Toronto.

Piragal Thiru will run under the Liberal banner in the riding of Scarborough-Rouge River.

The Liberals describe Thiru as "a long time regional volunteer and policy professional."

On Saturday, the Progressive Conservatives nominated city councillor Raymond Cho to run in the east Toronto riding.

The Scarborough-Rouge River seat has been vacant since Liberal backbencher Bas Balkissoon abruptly resigned in March.

Premier Kathleen Wynne has six months to call a byelection to replace Balkissoon, but no date has yet been set for the vote.