Three bomb warnings ‘came from same person’
Play
Forensics experts have determined that the same person wrote all three letters warning of a possible bomb attack on a hospital before Monday’s blast at Phramongkutklao Hospital.
The letters warned that Muslim insurgents from the deep South might stage a revenge attack against a medical institution in Bangkok.
A police source said on Friday that two of the letters were sent to the director of the Prasat Neurological Hospital and Institute and the third to the director of the National Cancer Institute of Thailand.
The source said forensic examination found that the same person wrote all three letters, though that person had attempted to disguise his or her identity by modifying the handwriting and content.
The letters were written on the same type of paper, which under magnification indicated the writer had traced the wording from one letter to the next, applying the same amount of pressure.
