French police have made several arrests following a deadly knife attack in the city of Mulhouse. The suspect, a 37-year-old Algerian-born man, was on a terrorism watchlist and subject to deportation orders. Three other people are in custody in connection with the case. The attack occurred near a busy market, resulting in one fatality and several injuries. The suspect was heard shouting 'Allahu Akbar' during the attack, leading President Emmanuel Macron to label it as an 'Islamist terrorist act.' France has recently experienced a series of stabbings deemed acts of terror.