An initial investigation determined that the explosives were in a green vase that contained artificial flowers. The vase was placed on a chair inside the Wongsuwan room in Phramongkutklao Hospital, the source said, adding that it was not yet known when the act was committed. Authorities are checking hospital security camera footage. At least 25 people were injured in the attack, mostly of whom were only slightly hurt.

Source: The Nation Bangkok May 22, 2017 08:26 UTC