BALTIMORE (WJZ) — An investigation is underway after a Baltimore City rowhome goes up in flames.

It happened late Thursday night in the 300-block of East Lafayette Street.

READ MORE: 'I Am Innocent': Marilyn Mosby Talks To Churchgoers About Federal Charges

Authorities say no one was inside the three-story home at the time of the fire.

READ MORE: Maryland Weather: Nor'Easter Snow Storm Arrives

One firefighter was hurt in the blaze. That person was treated at the hospital for minor injuries.

MORE NEWS: Pilot Of Crashed Medical Helicopter Released From Hospital

Investigators are still trying to figure out what sparked the fire.