Officials on Tuesday resumed the search for a female Russian tourist with dementia who had gone missing on Koh Samui in Surat Thani more than a month ago.
The operation is being assisted by a sniffer dog from the Nakhon Si Thammarat Border Patrol Police (BPP) command.
Inna Obukhova, 39, was last seen at Centra Coconut Resort Samui in Tambon Taling Ngam on April 20.
The renewed search operation, led by Samui police chief Pol Colonel Paithoon Krachachang, is divided into three teams.
The second team will comb Khao Hin Lek mountain in Tambon Taling Ngam, where there are several resort residences for Russians.
The third team will use a patrol boat to check around Koh Ha, which is an islet off Samui.
The small island is a private firm’s concession area for the collection of bird nests.
Paithoon said the team would check the area out after police had received tip-offs that a foreigner was seen climbing rocks on Koh Ha