Four men have been charged with the murder of a Singaporean woman in Cambodia.
A source in the country said they were construction workers who had been building the 52-year-old victim's new home in Kampong Speu province, west of Phnom Penh.
Two security guards, who are believed to be from the school where she taught, are also being investigated.
Mrs Wendy Ng, a relief principal at Hope International School- Kampong Speu, was found dead in a room at the school's living quarters on Tuesday.
She had been staying there temporarily until construction work was completed on her house, in the same town. Mrs Ng was found with three large stab wounds to her head, said Pastor Sinai Phouek, director of the Christian organisation New Hope for Orphans, which runs the school.
Speaking to The Straits Times on the phone from Cambodia, he said police found US$4,500 (S$5,500) in her safe - money that was meant to be distributed as salary for the school's teachers. Her killers are suspected to have targeted her because of the cash.
Mrs Ng was on the pastoral team of Glad Tidings Church in Singapore, while her husband Paul Ng is chairman of the board of the church.
When The Straits Times visited on Wednesday, a church worker who did not want to be named said the congregation was in shock. She described Mrs Ng as friendly and approachable. A memorial service will be held when her body is flown back.
The church's caretaker of three decades, 78-year-old Lim Song Choon, said Mrs Ng travelled to Cambodia about five times a year to help out at the orphanages there. She did not have any children.
Mr Ng and some church staff, including its senior pastor, are still in Cambodia. The victim's body is expected to be flown back either tomorrow or the day after.