Postmedia has entered an agreement to purchase Saltwire, Atlantic Canada's largest newspaper chain, according to a news release issued Friday.

Saltwire has been under creditor protection since March. It publishes more than 20 papers in Atlantic Canada, including The Chronicle Herald in Halifax, The Guardian in Charlottetown, and The Telegram in St. John's, along with associated websites.

In the release, the Canadian news media company said the potential acquisition aligns with Postmedia's commitm…