German police said they were holding a 26-year-old Syrian man in custody on Sunday after a knife attack in the city of Solingen in which three people were killed and eight injured, adding that they were looking into the suspect¡¯s possible links with the Islamic State.

The incident, along with the militant group¡¯s claim of responsibility, sparked concern among some politicians who urged enhanced security, tighter curbs on weapons, stiffer punishment for violent crimes, and limits to immigration.

The attack occurred during a festival on Friday evening in a market square where live bands were playing to celebrate Solingen¡¯s 650-year history.