Fire officials continue to investigate what caused a fire at a vacant tennis club near Collingwood earlier this month.

Crews were called to the Thomson Tennis School at 2407 Osler Bluff Road around 10:30 p.m. on June 4, 2015 and when they arrived the building was engulfed in flames.

The two-storey building was completely destroyed but luckily nobody was injured.

Fire officials say the tennis school has not been active for more than a year and because there was no power source to the building, the fire is considered suspicious.

The Ontario Fire Marshal’s Office have wrapped up their onsite investigation and still looking into the cause.