Warning shots fired by police

On Monday night in Rinkeby, several people threw stones at police, striking one officer in the arm. As the situation escalated, police fired warning shots to disperse the crowd and one shot at a rioter, a police spokesperson told CNN's Ivan Watson.

More riots erupted later in the evening, causing damage to shopfronts as well as instances of looting. A police spokesperson said 10 cars had been torched, but that order and security had been restored by midnight.

A CNN team in the area on Tuesday saw evidence of the damage: The doors of Rinkeby's subway station had been smashed, and other broken windows were covered in temporary plastic sheeting, but the burned-out cars had already been cleared away.

The area is known for its large immigrant population, but also for high levels of unemployment, Watson said.

Authorities have launched an investigation into the unrest.

"Of course it is very serious that the police officers are attacked when doing their job," Johansson said.

He added: "But I can assure that we are resilient and will not leave, rather intensify our work."

Large-scale riots in 2013

In an emailed statement to CNN, Swedish police said that while riots like those on Monday night are unusual, it is not the first time unrest has broken out in Rinkeby.

In 2015, more than 160,000 people -- many from Iraq, Syria and Afghanistan -- arrived in Sweden seeking asylum.

The country granted asylum to 101,025 refugees -- about 1% of the total population -- from 2012 to 2015.

Trump links migrants and crime

However, a former US ambassador told CNN that the country is perfectly safe regardless of the influx of refugees in recent years.

Djamel Zeghachov, a driver in Stockholm, told CNN: "We were like, what's happened right now? Has somebody stolen our meatballs? People were laughing about it."