REVERE (CBS) – More than 100 people were displaced and four firefighters were hurt in a massive fire at a Revere apartment building Sunday afternoon.

Flames broke out around 2 p.m. at the 4-story complex on Franklin Avenue.  It took several hours for firefighters to knock down the flames.

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Revere firefighters were unable to enter the building because flames were so severe. (WBZ-TV)

Smoke from the fire could be seen for miles.

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“Arriving firefighters saw only smoke and no fire inside each of the fourth floor apartments leading investigators to believe the fire was in a space above the apartments and below the roof, which is now mostly gone,” Jennifer Mieth, a spokesperson for the state fire marshal’s office, said in a statement Monday.

Smoke pours from a Franklin Ave. apartment fire in Revere. (WBZ-TV)

Thirty-eight apartments were gutted and the building is a total loss.  There is no word yet on a cause, but the fire marshal’s office said it is not suspicious.

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No residents were hurt. Four firefighters were treated for minor injuries at the hospital and released.