A French city with 2,600 fatalities has become the latest to record a spike in violence after a deadly attack on Sunday.
The city of Nantes, about 30 kilometres south of Nice in the south of France, recorded at least 1,000 deaths overnight.
Nice has been a hotspot of violent crime in recent months.
In February, a gunman opened fire on people leaving a concert at a nightclub in the city’s downtown area, killing 32 people and wounding hundreds.
Police have arrested more than 80 people in connection with that attack, which killed 86 people.
That attack followed another deadly attack that took place in the eastern city of Montpellier in February.
Police said the gunman entered the restaurant where the concert was taking place and opened fire, killing two people and injuring seven.
In January, the same gunman attacked a popular restaurant in the French Riviera city of Cannes, killing a French woman and wounding two others.
In April, police shot dead a man who had allegedly attacked a police officer with a knife outside a nightclub, a video showed.
On Monday, police said that in addition to the two Nice-related attacks, they had also arrested another man who was involved in a shooting on Monday in the town of Saint-Etienne-du-Rouvray, west of Nice.
The man, a 26-year-old French national, has been charged with attempted murder.
On Tuesday, Nice was also hit by another attack that left more than 150 people dead.
Authorities say the attack, at a soccer match, took place after an unknown man attacked a woman with a baseball bat and stabbed her several times in the neck and chest.
Police are investigating the incident.