White House Express kosher restaurant in Golders Green has been closed and is unlikely to reopen, the JC understands.
Acting on intelligence, immigration enforcement officers raided the premises in mid-February and arrested four men said to be working illegally.
Two of the men, a 26-year-old from India and a Pakistani, aged 27, were claimed to have overstayed their student visas. They are currently in immigration detention pending deportation.
A 31-year-old Indian was allegedly working in breach of his visa and a 33-year-old Afghan was said to have entered the UK illegally.