Authorities in Berlin have detained a teenage Syrian refugee after a man was stabbed near the city’s Holocaust Memorial late Friday – as divisive rhetoric swells over Germany’s immigration policy, ahead of a consequential national election.

The suspect, a 19-year-old Syrian man, was living in Germany legally. Germans head to the polls Sunday after a campaign dominated by debate about migration.

Investigators say the suspect in a stabbing attack at Berlin’s Holocaust Memorial that left a Spanish tourist seriously injured is a Syrian refugee who apparently wanted to kill Jews