Police have named a couple found dead at a house in Derby on Monday night.
The couple's children were not in the house at the time
The couple, who had five children, were 48-year-old Chang Phu Lai and his former wife 43-year-old Van Tinh Hoang.
Their bodies were found at a house on Wiltshire Road in Chaddesden and a murder inquiry was launched after officers discovered the dead couple.
But police believe the deaths were the result of a "domestic situation" and confirmed that they were not looking for anyone else.
Shock and upset
The dead woman's younger sister, a mother of six who helps run a takeaway in Wiltshire Road, said her sister had recently moved from Blackpool to Derby.
She did not want to be named but said: "I feel sad. I don't know why it happened, I was busy at the time.
"It's a shock. She was a nice person."
The couple's children were not in the house at the time their mother and father died.
"The investigation is in its early stages but initial inquiries lead us to believe it's a domestic situation," a police spokesman said.
A bladed weapon was found at the scene but police said they would wait for the results of the post mortem examinations before commenting on the cause of death.