An MTA bus driver has been arrested on charges of striking a pedestrian who was killed in lower Manhattan on Friday evening, the NYPD said. 

The victim, 58-year-old Bella-Yury Krementsova, was struck by a QM7 bus around 5:30 p.m. near Whitehall and Water streets, and dragged nearly a half a mile to Trinity Place near Exchange Alley, police said. As the bus approached Exchange, the driver was alerted by pedestrians that there was a woman under the rear of the bus, cops said.

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The driver, Roger Weckworth, stopped the bus and remained at the scene as emergency personnel responded.

Weckworth, 63, was later arrested and charged with failure to yield to a pedestrian and failure to yield to a pedestrian causing injury, the NYPD said.

Krementsova's last known address was on the Upper West Side, police said.   

With Polly Higgins