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A rapper who uploaded two videos of the stabbing incident at Leytonstone station on Saturday night has used the subsequent publicity to promote his debut single.
After witnessing the attack at the east London Underground station, Big Tobz sent a flurry of tweets showing a man being confronted by police and a large pool of blood on the floor.
He posted a series of three tweets in the aftermath of the attack.
Big Tobz has not responded to i100.co.uk's requests for comment.
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