The flag of the Republic of North Macedonia was flown at half-mast. Bulgaria has also declared a day of mourning on Wednesday.
“We are together with our North Macedonian brothers and grieve together in this tragedy. We hope the survivors recover swiftly,” said Bulgaria’s President Rumen Radev.
EU chief Ursula von der Leyen sent her “deepest condolences to the families and friends of those who perished in the tragic bus accident” and wished “a fast recovery to those injured”.
“In these terrible times, Europe stands in solidarity with you,” she went on.
The government in North Macedonia has called for three days of national mourning following the accident.
Although the cause of the crash has yet to be determined, officials believe the bus swerved off the motorway and tore a 50m section of the crash barrier.
But it is not yet known if the bus caught fire before or after the crash. No other vehicles were involved in the accident.
At least 46 people killed, including children, as vehicle bursts into flames
Russian President Vladimir Putin also expressed his “sincere condolences” and said he hoped for “the speedy recovery of all those wounded”.
‘I lost my whole family’
Media in North Macedonia reported that several of the dead were from a Skopje primary school, where all classes were stopped.
“I lost my whole family in the blaze,” one man told local media, saying 10 of his relatives had died. /argumentum.al