BANGKOK, May 23 (Reuters) - Twenty people who were

aboard a Singapore Airlines flight that hit severe

turbulence and diverted to Bangkok for an emergency landing on

Tuesday remain in intensive care, a hospital official said on

Thursday.

Of the 40 people on the flight still under treatment, 22

patients have spinal cord injuries and six have brain and skull

injuries, Adinun Kittiratanapaibool, Director of Bangkok's

Samitivej Srinakarin Hospital told reporters.

Adinun had said 41 people were still under treatment, but

later said one person had been discharged.

One passenger died of a suspected heart attack and dozens

were injured after Singapore Airlines flight SQ321 encountered

what the airline described as sudden, extreme turbulence while

flying over Myanmar on Tuesday.