A Toronto police officer died while on the job Thursday morning, the service says, with early evidence suggesting the officer experienced a medical episode while he was executing a search warrant.

Det. John Park, a 40-year-old father of two and 14-year veteran of the force, died shortly after participating in a hold-up squad investigation into a recent robbery. Though his death is under investigation, police say preliminary information suggests he died from a medical event unrelated to his line-of-duty work on Thursday morning.

Toronto police have installed books of condolence at three locations for people who wish to leave messages of support for family, friends, and colleagues of the late Det. John Park.

A Toronto officer died while on duty Thursday morning after experiencing a medical episode, the force says. Early Thursday morning, Det. John Park was conducting a search warrant in the area of Jane Street and Steeles Avenue in North York when he had a medical episode, Deputy Chief Lauren Pogue told media in a news conference Thursday afternoon.

A police officer who died after having a suspected medical episode on duty was executing a search warrant in connection with an ongoing robbery investigation in North York, Toronto police confirmed Thursday.

Those wishing to pay their condolences to Toronto Police Det. John Park, who died after a medical episode while executing a search warrant on Dec. 19, can do so in person and online. Books of condolence are available to honour Park,