The home secretary has demanded a "full explanation" from Twitter and Instagram on why anti-Semitic posts by rapper Wiley were not removed more quickly.
Priti Patel said the posts were anti-Semitic and "abhorrent".
"Social media companies must act much faster to remove such appalling hatred from their platforms," she said.
Wiley, 41, known as the "godfather of grime", shared conspiracy theories and insulted Jewish people on his Instagram and Twitter accounts, which together have more than 940,000 followers.
Twitter removed some of Wiley's tweets with a note saying they violated its rules - but other tweets were still visible 12 hours after being posted. It later said Wiley's account had been locked for seven days.
Facebook - which owns Instagram - said on Sunday that the platform had also blocked the rapper from his account for seven days, and that there was "no place for hate speech on Instagram".
Wiley's series of posts began on Friday night and his manager John Woolf's initial response was that, having known the artist for 12 years, "he does not truly feel this way".
Wiley first entered the UK singles charts with Wearing My Rolex in 2008. His subsequent hits include Heatwave in 2012 and Boasty in 2019, a collaboration with rappers Stefflon Don and Sean Paul and actor Idris Elba.
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