The Suffolk fire marshal is investigating two recent fires at vacant homes in the city, but the incidents do not appear to be related, according to a city press release.

The first fire happened shortly after midnight on May 1 in the 100 block of North 10th Street. The two-story home was engulfed in flames by the time firefighters arrived.

At 1:49 a.m. on May 2, fire crews responded to a fire in the 300 block of Boat Street in the Saratoga neighborhood and found a small fire in the back portion of the vacant residence.

Both fires are believed to be suspicious in nature, according to the release.

Anyone with information is asked to call Crime Line at 1-888-LOCK-U-UP.