Police raided locations Wednesday linked to Tokyo-based elevator maker Schindler Elevator K.K. and a housing corporation, suspecting that professional negligence or poor maintenance caused the fatal crushing of a teenager on a lift last weekend.

The accident in which high school student Hirosuke Ichikawa, 16, died Saturday happened when an elevator in a Minato Ward condominium building went up with its doors open. Ichikawa was caught between the elevator and the frame, police said.

He suffered a fractured skull and died soon after being taken to a hospital.