ROME —

Firefighters worked to rescue a worker trapped for hours beneath the rubble of a medieval tower that partially collapsed while under renovation in the heart of Italy's capital on Monday, critically injuring another worker.

Firefighters faced a complex task as the structure continued to give way as they tried to get near the trapped worker through a first-floor window, forcing their retreat on telescopic aerial ladders in a cloud of smoke. Another approach on two ladders was also aborted, and a drone sent up in their stead.

Three workers were rescued unharmed after the initial midday collapse, which forced one worker to be hospitalized in critical condition, said firefighter spokesman Luca Cari. There was no immediate update on his condition. No firefighters were injured in the on

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