
Police said the upper part of the crane on Soi Lard Prao 31 slipped off and fell onto the roof of a house on Soi Lard Prao 29 at 12.25pm.
The crane, belonging to contractor JDCM, was being used to in construction of the third floor of a five-floor building.
The injured house occupants were identified as Banyen Phudamrong, 62, and Phayunsak Chankul, 33. Both were taken to Paolo Memorial Hospital.