The Ontario Fire Marshal's office is investigating after an early morning fire at a golf course south of Ottawa.

Fire crews were called to Cloverdale Links, near Winchester, at about 3:30 a.m. Wednesday after an old two-storey building used for storage went up in flames.

Ontario Provincial Police say they've investigated about 18 structural fires in the area over the last two years.

Police, however, won't confirm if any of the fires are related.

Despite the blaze, Cloverdale Links remained open to golfers on Wednesday.