Dr Thatsaporn Rattanawongsa became the fourth suspect arrested on the charge.

Police raided Thon Buri Hospital and arrested the doctor as she was waiting to start her shift at the hospital. Police then accompanied her to her residence in Saphan Kwai area to search for more evidence.

Police claimed the doctor joined the three other sus-pects arrested earlier in spreading false information about HM the King's health.

The three suspects were Theeranun Wipuchanin, a for-mer executive of a securities company; a Bangkok-based stock broker of KT-Zmico Securities Katha Pajariyapong; and Somjaet Itthiworakun of Chon Buri.

Charged with violating the 2007 Computer Offence Act, they could face up to five years in prison if convicted.