BANGKOK, May 22 (Reuters) - Twenty people onboard a

Singapore Airlines flight that hit severe turbulence

on Tuesday are currently under treatment in intensive care

facilities, Bangkok's Samitivej Hospital said in a statement on

Wednesday.

The hospital said a total of 58 people were still under

treatment at multiple medical facilities, and 27 had been

discharged.

The scheduled London-Singapore flight was diverted to

Bangkok after the plane was buffeted by turbulence that flung

passengers and crew around the cabin, slamming some into the

ceiling. One passenger died of a suspected heart attack.