Young rioters clashed with police and looted stores in a fourth night of unrest in France triggered by the deadly police shooting of a teenager.

The scenes pile more pressure on president Emmanuel Macron after he appealed to parents to keep children off the streets and blamed social media for fuelling violence.

While the situation appeared to be somewhat calmer compared to previous nights, turmoil gripped several cities across the country.

Firefighters in the Parisian suburb of Nanterre, where the shooting occurred on Tuesday, extinguished the blazes set by protesters that left scorched remains of cars strewn across the streets.

In the neighbouring suburb Colombes, protesters overturned garbage bins and used them for makeshift barricades.

Looters during the evening broke into a gun shop and made off with weapons, and a man was later arrested with a hunting rifle, police said, and in the southern Mediterranean port city of Marseille, officers arrested nearly 90 people as groups of protesters lit cars on fire and broke store windows to take what was inside.

Buildings and businesses were also vandalised in the eastern city of Lyon, where a third of the roughly 30 arrests made were for theft, police said.

Authorities reported fires in the streets after an unauthorised protest drew more than 1,000 people earlier in the evening.

By about 3am, interior minister Gerald Darmanin told cable news channel BFMTV that 471 arrests were made during the night.

The fatal shooting of the 17-year-old delivery driver, who has only been identified by his first name, Nahel, was captured on video, stirring up long-simmering tensions between police and young people in housing projects and disadvantaged neighbourhoods.

Nahel’s burial is scheduled for Saturday, according to Nanterre mayor Patrick Jarry, who said France needs to “push for changes” in disadvantaged neighbourhoods.

Despite repeated government appeals for calm and stiffer policing, Friday saw brazen daylight violence, too.

An Apple store was looted in the eastern city of Strasbourg, where police fired tear gas, and the windows of a fast-food outlet were smashed in a Paris-area shopping mall, where officers repelled people trying to break into a shuttered store, authorities said.

Violence was also erupting in some of France’s territories overseas.

Some 150 police officers were deployed on Friday night on the small Indian Ocean island of Reunion, authorities said, after protesters set garbage bins ablaze, threw projectiles at police and damaged cars and buildings.

In French Guiana, a 54-year-old was killed by a stray bullet on Thursday night when rioters fired at police in the capital, Cayenne, authorities said.

In the face of the escalating crisis that hundreds of arrests and massive police deployments have failed to quell, Mr Macron held off on declaring a state of emergency, an option that was used in similar circumstances in 2005.

Instead, his government ratcheted up its law enforcement response. Already massively beefed-up police forces were boosted by another 5,000 officers for Friday night, increasing the number to 45,000 overall, the interior minister said.

Mr Darmanin, said police made 917 arrests on Thursday alone and noted their young age — 17 on average. He said more than 300 police officers and firefighters have been injured.

It was unclear how many protesters have been injured in the clashes.

Mr Darmanin on Friday ordered a nationwide night-time shutdown of all public buses and trams, which have been among rioters’ targets. He also said he warned social networks not to allow themselves to be used as channels for calls to violence.

Mr Macron, too, zeroed in on social media platforms that have relayed dramatic images of vandalism and cars and buildings being torched, saying they were playing a “considerable role” in the violence.

Singling out Snapchat and TikTok, he said they were being used to organise unrest and served as conduits for copycat violence.

Mr Macron said his government would work with technology companies to establish procedures for “the removal of the most sensitive content”, adding that he expected “a spirit of responsibility” from them.

Snapchat spokesperson Rachel Racusen said the company has increased its moderation since Tuesday to detect and act on content related to the rioting.

The police officer accused of killing Nahel was handed a preliminary charge of voluntary homicide, which means investigating magistrates strongly suspect wrongdoing but need to investigate more before sending a case to trial.

Nanterre prosecutor Pascal Prache said his initial investigation led him to conclude that the officer’s use of his weapon was not legally justified.

Mr Prache said officers tried to pull Nahel over because he looked so young and was driving a Mercedes with Polish license plates in a bus lane. He allegedly ran a red light to avoid being stopped and then got stuck in traffic.

The officer said he feared he and his colleague or someone else could be hit by the car as Nahel attempted to flee, according to the prosecutor.

Nahel’s mother, identified as Mounia M, told France 5 television that she was angry at the officer but not at the police in general.

“He saw a little Arab-looking kid, he wanted to take his life,” she said, adding that justice should be “very firm”.