Two more men were arrested in connection with a knife attack that left three dead at a church in Nice, bringing the number of people in custody to six as investigators look at the suspected assailant's last known contacts, a French police source said.

The latest arrests took place on Saturday, the source said.

An assailant shouting "Allahu Akbar" (God is Greatest) beheaded a woman and killed two other people in a church in Nice on Thursday, in France's second deadly knife attack in two weeks with a suspected Islamist motive...