Sofia (Bulgaria), Nov 24 (AP) Bulgarian and North Macedonia began periods of national mourning on Wednesday, a day after a bus travelling through Bulgaria carrying tourists to neighbouring North Macedonia crashed and caught fire, killing 45 people.

The bus with 52 people on board was one in a convoy of buses returning from a trip to Turkey. Though the exact cause of the crash has not yet been determined, the bus apparently ripped through a guardrail on a highway, quickly engulfed in flames and burned out completely. A dozen children were among the dead.

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Bulgaria was holding a day of national mourning Wednesday while North Macedonia began a three-day period. National flags of all state institutions were being flown at half mast while entertainment events were cancelled.

Seven survivors were hospitalized at the main emergency hospital in Sofia, the Bulgarian capital, with severe burns and body injuries.

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North Macedonia's Foreign Minister Bujar Osmani visited the hospital Wednesday, telling reporters he was there to to meet patients and facilitate communication between family members and the institutions in Bulgaria.

Forensic doctors from Skopje, the capital of North Macedonia, were also expected to join their Bulgarian colleagues in Sofia to carry out DNA tests to identify the bodies of those killed in the crash.

Bulgarian Interior Minister Boyko Rashkov told reporters at the crash site Tuesday that he had never "seen something more horrifying” and that the identification process would take time. “The people who were on the bus are turned to charcoal,” Rashkov said.

Among the survivors were five North Macedonia citizens, one Serb and one Belgian, according to North Macedonia's Foreign Ministry.

Albanian Foreign Minister Olta Xhacka said almost all of the dead were ethnic Albanians, but it was not clear if they were also citizens of North Macedonia.

The burned-out shell of the bus was towed away on a truck on Wednesday, escorted by police on the outskirts of Sofia. (AP)

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)