The Honolulu Fire Department is investigating three suspicious fires that occurred in the same area of Waiawa within an hour Thursday morning.

Between 7:20 a.m. and 7:35 a.m., firefighters responded to two separate small fires, the first along Farrington Highway near Home Depot and the second inside a rubbish can at a bus stop near the Benjamin “Ben” Saguibo Laborer’s Apprenticeship & Training Center.

Firefighters quickly extinguished both fires.

At 7:54 a.m., 11 units and 35 firefighters responded to the third blaze — a two-alarm fire at a vacant property at 96-130 Farrington Highway.

The fire occurred at a 1,000 square-foot, open-air warehouse with a corrugated metal roof. About half of the warehouse was engulfed in flames. Within the warehouse was a small hollow-tile structure that also caught fire, according to Honolulu Fire Battalion Chief Paul Fukuda.

Firefighters brought the fire under control at 8:08 a.m. and extinguished it at 8:25 a.m.

No injuries were reported.

Fukuda described all three fires as “suspicious.”

Honolulu Fire Spokesman Capt. David Jenkins said investigators are looking into whether there’s a link between the three fires.

The cause of the third fire is under investigation and a damage estimate has yet to be determined.