South African police said on Sunday they have opened an investigation into the death, in full concert, of rapper

Costa Titch

.

The 27-year-old artist, a leading figure in the African country's rap movement,

"collapsed while he was performing at a concert" on Saturday night on the outskirts of Johannesburg

, police told AFP.

The causes of death have not yet been established.

The death of

Costa Tsobanoglou

, his real name, comes a month after the murder of another well-known rapper in South Africa,

Kiernan Forbes or AKA

.

The musician was shot dead outside a restaurant in Durban (southeast).

The investigation is still open.

Costa Titch

was known for his song "Big Flexa"

, which had 45 million views on YouTube.

On social networks,

videos of the concert on Saturday circulate in which the rapper, in white

, is seen falling for the first time on stage, in what seems like a trip.

He continues singing but a little further on he collapses and his companions rush to help him.

According to the criteria of The Trust Project

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