Martin Manrique, a Mexican citizen, has been arrested for the killing of his Mexican ex-girlfriend, Cecile Denise Acosta Reinaud, in India, a police spokesman told Efe on Wednesday.

“Mr. Manrique has confessed that he ended her life during an argument with the deceased over custody of their 6-year-old daughter,” Madurai police chief Bala Naga said.

The 36-year-old Acosta, who had dual French-Mexican citizenship, threatened to take the little girl to France, triggering a fight that ended with the 40-year-old Manrique stabbing her to death, the police chief of the southern Indian city said.