France’s foreign minister says one French citizen was killed and three others wounded in the New Year’s shooting attack at a crowded Istanbul nightclub, AP reports.

Foreign Minister Jean-Marc Ayrault said in a statement that a woman with both French and Tunisian citizenship died in the attack early Sunday.

Ayrault says the woman’s Tunisian husband also died.

Due to the presence of French citizens among the casualties, the Paris prosecutor’s office says it has opened a criminal investigation for “terrorist murders and attempted murders.”

An assailant opened fire at the Reina nightclub during New Year’s celebrations, killing at least 39 people.

Turkish authorities said foreigners from “many different nationalities” are among the wounded in the attack.

French President Francois Hollande says in a statement that France “will pitilessly pursue the fight” against terrorism with its allies.