TORONTO - NDP Leader Andrea Horwath says the June 12 election in Ontario is a "referendum on corruption."

Horwath is making several campaign stops around the Greater Toronto Area today, saying the party is hearing from some traditional Liberal or Progressive Conservative voters who say this time they will vote NDP.

She says Premier Kathleen Wynne "has been running from the Liberal record of scandal and she cannot get away from it."

Police investigating the alleged destruction of government documents related to the cancellation of two gas plants by the Liberals have asked for key records from the legislature.

Ontario Provincial Police are seeking visitors' logs and other records in the investigation that earlier determined some hard drives in the former premier Dalron McGuinty's office had been wiped clean of data.

Sgt. Pierre Chamberlain said the order delivered to the legislature gives 10 business days to produce the documents.