A nine-year-old boy and four adults were killed and more than 200 others were injured after a car plowed into a crowd at a Christmas market in the eastern German city of Magdeburg on Friday, officials said.

Police said at least 41 people were seriously injured after the incident, which lasted about three minutes.

Local media reported that the arrested suspect is called Talib Al-Abdul Mohsen, a 50-year-old Saudi citizen, who arrived in Germany in 2006 and worked as a doctor.

Rainer Haselof, Prime Minister of the state of Saxony-Anhalt, said the preliminary investigation indicated that the alleged attacker was acting alone.

He added that he did not rule out more deaths given the number of injured.

The head of the local public prosecutor’s office said on Saturday that the suspect is currently being interrogated and prosecutors expect to charge him with murder and attempted murder in due course.

Prosecutor Horst-Walter Nobbens added that the investigation was continuing but noted that the background to the crime “may have been dissatisfaction with the way Saudi refugees were treated in Germany.”

The suspected attacker has no known links to Islamic extremism, and social media and online postings appear to indicate he was criticizing Islam.

Footage from the scene showed several emergency services vehicles attending while people were lying on the ground.

Further footage then emerged of armed police confronting and arresting a man who can be seen lying on the ground next to a parked car.

An unverified video on social media allegedly shows a car plowing into a crowd of people in the market.

City officials said that about 100 police, paramedics and firefighters, as well as 50 rescue service members, rushed to the scene.

Police said the suspect is believed to have entered the market through an entry point designated for emergency vehicles.

German Chancellor Olaf Scholz, who traveled to the city on Saturday, described the attack as a “terrible tragedy” in which “so many people were injured and killed with such brutality” in a place that was supposed to be “joyful.”

He told reporters that there were serious concerns about those seriously injured – which German media reports put in the dozens – and that “all resources” would be allocated to investigating the suspect behind the attack.

He added that a memorial service for the victims would be held in Magdeburg Cathedral later on Saturday.

In an interview with the German newspaper Bild, Nadine described being at the Christmas market with her friend Marco, when the car came speeding towards them.

“He was beaten and dragged away from my side,” the 32-year-old told the newspaper. “It was terrible.”

Meanwhile, Lars Frommüller, a correspondent for German public broadcaster MDR, told BBC Radio 4’s World Tonight that he saw “blood on the floor” as well as “several doctors trying to warm people and help them treat their injuries.”

German media identified the suspect as Talib Al-Abdul Mohsen, a psychiatrist who lives in Bernburg, about 40 kilometers (25 miles) south of Magdeburg.

Originally from Saudi Arabia, he arrived in Germany in 2006 and in 2016 was recognized as a refugee.

He ran a website aimed at helping other former Muslims flee persecution in their Gulf homelands.

As evidenced by his social media posts, the suspect is an outspoken critic of Islam and has promoted conspiracy theories regarding a plot to achieve Islamic supremacy in Europe.

When the accident happened, the Magdeburg football team was playing against Fortuna Düsseldorf.

After the match ended, the team’s players united in one line in front of their fans. A club statement said: “Our thoughts are with those affected by the terrible events and Christmas market in Magdeburg.”

Meanwhile, a minute of silence was observed at the end of the match between Bayern Munich and RB Leipzig in Munich.

Friday’s incident is not the first time people at a Christmas market have been attacked in Germany.

In 2016, Anis Amri, a Tunisian man who failed to obtain asylum in Germany and had links to the so-called Islamic State, He drove a truck through crowds gathered in a church market in BerlinAs a result, 12 were killed and 49 others were injured.

Two years later, a gunman opened fire at a Christmas market in the eastern French city of Strasbourg, killing five people and wounding 11 others. The gunman was shot dead by police two days later.

Just last month, German Interior Minister Nancy Wieser spoke of the need for “more vigilance” in popular markets – but said there were no “concrete” signs of danger.

She also reportedly pointed to stricter laws on weapons in public places following a knife attack in Solingen, western Germany, in August, which killed three people — an incident that reignited an already fraught debate over asylum and immigration in Germany.