Thousands stood with heads bowed Tuesday in cold and wind at a silent ceremony to remember the victims of the hand grenade and automatic rifle attack that left five dead in one of Belgium's biggest cities.
Prime Minister Elio Di Rupo and Crown Prince Philippe stood with the Liege mayor in a solemn ceremony on the same city center cobblestones that were stained with blood in the attack exactly a week ago.
Investigators are still looking for clues to why Nordine Amrani, a 33-year-old with a criminal record, swept into the central square in the middle of the Christmas shopping season to unleash the rampage that killed four people and wounded 123 others. He committed suicide immediately after the attack.
Instead of speeches, a lone trumpet pierced the silence of the half-hour ceremony. Officials carried white roses and added them to a thick wall of mementos that has grown as Liege residents expressed their grief. The adjacent Christmas market did not open as it normally would in remembrance of the victims.
"When I heard and saw this, I was really touched by this tragedy and it is to give homage that I am here," said Maxim Lonhienne, a resident of the city of 200,000 who was part of the packed crowd.
At the end of the 30-minute ceremony, subdued applause rippled across the square as Crown Prince Philippe and Princess Mathilde left.
Authorities said they still did not know what drove Amrani. Before the massacre, he also shot to death a housekeeper at a shed he owned. It remained unclear what connection that killing had to the deadly rampage.
"We are trying to find out who this person really is and how someone who did not give any sign of mental difficulties could have acted in such a way," Liege prosecutor Cedric Visart de Bocarme told RTL television.
Amrani, who had done jail time for offenses involving guns and drugs, had been called in for questioning in a sexual abuse case on the day of the shooting. Instead of meeting with investigators he took a backpack filled with ammunition and grenades to the square.