Grieving parents of the 22 children killed in the Swiss bus crash, as well as relatives of the six adults who also died, have visited the site of the accident and laid bouquets of flowers.
Earlier, they were taken to the morgue to formally identify the victims. 21 were from Belgium, and seven were from the Netherlands.
24 other children were injured in the crash in a motorway tunnel in southern Switzerland; at least three are believed to be in a critical condition in hospital.
The group had been returning from a skiing holiday when their bus slammed into a concrete wall in the Sierra motorway tunnel in the Swiss Alps on Tuesday night.
Transport investigators are examining the wreckage of the bus to determine how and why the accident happened.
The coach had only just reached the motorway after a short descent along winding roads from the mountain ski resort, close to the Italian border.
Prosecutors have said that the driver was not speeding.
The coach was carrying pupils from primary schools in Lommel, near the Dutch border, and Heverlee, in the suburbs of Leuven.
The Mayor of Leuven is said to be furious with Swiss authorities over the delays in confirming the identities of the dead and injured.
Dirk De Gendt, the Deacon of Leuven, told a news conference this evening that uncertainty remained among relatives in the town about what had happened.
Mr De Gendt said some children from St Lambertus' school could return to Belgium tomorrow, but this was subject to Government approval.
He added that parents of the 22 children who died, have yet to decide if there should be a collective funeral or individual ceremonies.
A seven person team is now available to the school to help children, parents and teachers with any psychological problems that present themselves.
The bodies of the victims will be repatriated tomorrow aboard a C-130 military transport plane, a government spokesman said.
Officials said earlier that the first remains would return today.
Prime Minister Di Rupo explained that identifying the bodies was taking time. "It is a painful and sometimes long process," he said.
Day of Mourning
Belgium has announced a day of national mourning tomorrow.
A minute of silence will be observed at 11am (10am Irish time) in schools, public offices and across the country with flags at half mast and ceremonies planned into the weekend, the government announced.
"The whole country weeps for its children," Mr Di Rupo told parliament, a day after meeting the families of the victims in Switzerland.
"The entire country will pay tribute to these shattered lives. The victims of this horrific drama will forever stay in our hearts and our memories. This is a national tragedy."
