Mourners laid flowers near the scene of the deadly Christmas market attack on Monday as investigators puzzled over the motive of the suspect and fears swirled that the rampage could deepen divisions in German society.

The Johanniskirche, a church a short walk from the scene of the attack, has become a central place of mourning since the suspect drove a car into the busy market on Friday evening, killing five people. A carpet of flowers now covers the broad sidewalk in front of the church.