Published: Aug 12, 2012 9:45 AM EDT

LEHIGH ACRES, Fla.- Fire officials are calling an early morning house fire suspicious in Lehigh Acres.

Fire Fighters arrived on scene at a duplex that was fully engulfed in flames around 2 a.m.

It's in the 1100 block of Westminster Street.

Officials say nobody was inside at the time and neighbors called in the blaze.

The Florida State Fire Marshall's office is investigating.