• A vehicle attack at Berlin's Christopher Street Day Pride event resulted in one woman killed and 16 others injured, sparking a political debate over security, extremism, and migration.
• German politicians are evaluating the political consequences of the attack, with the far-right Alternative for Germany (AfD) leading in polls ahead of key state-level elections.
• The suspect, a 21-year-old born in Berlin with a history of radicalization, is still at large, prompting calls for stricter security measures and preventive detention to counter extremist movements.

The deadly vehicle attack near Berlin's Christopher Street Day (CSD) has already become a major political issue, and a debate over security, extremism and migration is intensifying as several key German election campaigns are under way.

Less than 24 hours after the terrorist attack on a Pride event in central Berlin, German politicians on Sunday were evaluating the political consequences just months before key state-level elections with the far-right Alternative for Germany (AfD) riding high in the polls.

A woman was killed, and 29 other people were injured, some seriously, when just before midnight on Saturday a vehicle drove into the throng in the city's huge Tiergarten park. They were attending one of the capital's largest and most prominent events celebrating LGBTQ+ rights.

Chancellor Friedrich Merz was quick to respond. "This is an attack on our society," he posted on X, terming the attack "heinous."

Interior Minister Alexander Dobrindt said police believed the incident was an Islamist terrorist attack.

Berlin is preparing for state elections on September 20, as is Mecklenburg-Vorpommern to the north. In both states, the hard-right Alternative for Germany (AfD) is leading in the polls - if only marginally in the capital itself.

Two weeks before that, the eastern state of Saxony-Anhalt holds its elections. Here the AfD has a strong lead.

Observers say that Saturday's attack may well boost the anti-immigrant party.

Berlin police are now searching for 21-year-old Abdul B., who was born in Berlin in 2005 after his Lebanese-born mother became a German citizen in 2002.

Authorities say he had previously attracted attention because of radicalization and had already been convicted of criminal offences.

Within hours, politicians began proposing policy responses. The AfD's Berlin branch blamed what it described as Germany's failed migration policy and accused previous governments of being too lenient towards violent Islamists.

Meanwhile, interior affairs politician Günter Krings of Merz's Christian Democratic Union (CDU) called for longer prison sentences for Islamist terrorists, stricter citizenship rules and broader use of preventive detention and deportation measures.

His party colleague Alexander Throm urged parliament to pass all pending security legislation immediately after the summer recess.

According to Felix Neumann, a terrorism expert, extremist radicalization increasingly occurs through the internet.

He said both Islamist and far-right extremist movements rely heavily on social media, where algorithms repeatedly expose users to similar content, reinforcing extremist beliefs within online bubbles.

In the case at hand, investigators still need to determine whether the suspect - who is still at large - had any direct contact with any organized Islamist group.

Neumann reiterated that absolute security cannot be achieved. "There will always be people who, for whatever motive, resort to violence and find loopholes."

He argued that prevention requires close cooperation between intelligence agencies, police, and programmes designed to counter radicalization.

Recent attacks by foreign nationals - many of them inspired by Islamist motives - have raised the political temperature in Germany. They also may have driven voters to vast their vote for the far-right.

According to the University of Frankfurt, the 2025 study 'Terrorism and Voting: The Rise of Right-Wing Populism in Germany' examined the link between terrorist attacks and election results in the affected municipalities between 2010 and 2016. The finding: "Where attacks were successful, the AfD's share of the vote in state elections rose by around six percentage points."

Terrorist events also directly affect policy: Following a notorious attack in 2016 on a Berlin Christmas market, parliament expanded the powers available to security agencies, which authorities say have since helped prevent several planned attacks.

More recently, after a knife attack in Aschaffenburg in January 2025, in which an Afghan national with severe mental illness killed a Moroccan toddler and a German man, the focus of the federal election campaign shifted almost overnight towards migration and internal security.

A similar pattern followed the May 2024 Mannheim knife attack, in which a police officer was killed shortly before the European Parliament elections.