A fire early Friday morning in a vacant house in South Buffalo spread to the next door occupied house, forcing five adults residents to flee, Buffalo firefighters said.

The blaze at 150 Orlando St. spread to 148 Orlando at about 2 a.m., fire officials said,

The adults escaped without injury and were assisted by the Red Cross.

Damage to the vacant house was listed at $60,00 and damage to the occupied house was listed at $20,000.

The cause of the blaze remains under investigation.