Hamilton began his F1 career with McLaren and secured his first world title with the team in 2008.
Of the abuse overnight, his former team said: "McLaren stands with Formula 1, the FIA, and our fellow teams and drivers in condemning the deplorable racist abuse towards Lewis Hamilton.
"Racism must be driven out of our sport, and it’s our shared responsibility to unite and eliminate it."
McLaren Racing CEO Zak Brown added: "Totally unacceptable racist abuse of Lewis Hamilton. These people do not represent F1 fans or our sport. We must come together to get rid of this disgraceful abuse and racism."
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