A pregnant woman dubbed "Aem Cyanide" is facing 10 charges, mostly for premeditated murder, for fatalities suspected to be linked with cyanide poisoning.

Police late Saturday night elaborated on the arrest warrants against Sararat Rangsiwuthaporn. Seven of the warrants were based on charges of premeditated murder in cases ranging from late 2020 to as recently as this month.

The seven warrants on suspected premeditated murder concerned the deaths of:

- a woman who was found dead in Nakhon Pathom province on Dec 13, 2020;

- a man in Kanchanaburi;

- another woman in Ratchaburi on Jan 6, 2021;

- a policewoman in Nakhon Pathom on Aug 10, 2022;

- a female teacher in Nakhon Pathom on Sept 10, 2022;

- a female teacher in Nakhon Pathom on Nov 20, 2022; and

- a policewoman in Nakhon Pathom on April 1 this year.

Ms Sararat was also wanted for the alleged murder of another woman in Samut Sakhon on Aug 10, 2022; the alleged attempted premeditated murder of another woman in Kanchanaburi; and alleged theft relating to the death of a woman in Ratchaburi on April 14 this year.

Police said investigators were looking into lending groups that might involve Ms Sararat because many of the deceased each transferred money in five to six-digit amounts to her before their deaths.

Police said the suspect abused her victims’ trust and lured them into making merit and having meals with her. He added that the case involved 14 deaths and one survivor.

The 36-year-old suspect, a native of Kanchanaburi province nicknamed Aem, was dubbed "Aem Cyanide" after police found traces of cyanide in the most recent dead body and in the suspect's vehicle in a probe into what is believed to be serial killings.

Ms Sararat, who is four months pregnant, was arrested at the government complex on Chaeng Watthana Road in Bangkok on Tuesday.