BALTIMORE, MD (WJZ)– Baltimore City firefighters were called to the 1200 block of S. Highland Ave around 5 a.m. on Saturday for a report of a rowhome fire.

When fire crews arrived they found heavy fire showing from a 3-story home and the fire was also able to spread to the two adjacent homes.

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Firefighters quickly elevated the fire to two alarms and say four people sustained injuries and were transported in serious condition.

The cause of the fire remains under investigation.

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CBS Baltimore Staff