A woman was hospitalized in critical condition after firefighters responded to a house fire in St. Petersburg.

According to St. Petersburg Fire and Rescue, crews responded to a two-story townhouse in the 5800 block of 16th Lane S. When they arrived, they found heavy smoke coming from the front door on the first floor of the house.

When firefighters went inside, they found a 63-year-old woman unresponsive on the second floor.

The woman was taken to the Bayfront Health St. Petersburg in critical condition.

The cause of the fire is under investigation.