Officials from the Windsor Fire Department are investigating a pair of overnight fires.

The first blaze occurred just before 2:30 a.m. Saturday in the 900 block of Drouillard Road in a vacant commercial building.

Nobody was injured.

The Ontario Fire Marshal’s office has been called in to investigate.

A second fire erupted around 3:30 a.m. in the 6500 block of Tecumseh Road East.

Four vehicles in a parking lot were engulfed as crews arrived on the scene.

A cause for either blaze has yet to be determined.