The former East 17 frontman was held by police yesterday and questioned for allegedly sending malicious tweets.
However, he was sacked from the group in 1997 for making comments condoning the use of ecstacy following the death of Leah Betts, who died aged 18 after taking a pill.
"The Metropolitan Police Service has received an allegation of malicious communications relating to a Twitter account", a statement from the police service read.
The group had enjoyed huge success, selling 18 million records including 17 top 20 singles.
L'auteur de tags "Juif" s'est rendu à la police — Marseille
Ce week-end, plusieurs tags ont été découverts dans le centre-ville. Pour moi, il y a une relation de cause à effet. Un restaurant chinois avait toutefois été visé.
The former East 17 singer was taken to a London police station on Wednesday for questioning about a Twitter account. He later reunited the band under the new name of E-17 and pursued a solo career.
Harvey, whose relationship in the 1990s with Danniella Westbrook was widely publicised, has become more famous for his personal life in recent years.
In 2005, Harvey was run over by his own auto, making the extraordinary claim it was caused by a meal of three giant baked potatoes smothered in tuna mayonnaise and cheese.
Then there was the time Harvey stormed 10 Downing Street and demanded to speak to the PM.
Brian has not publicly commented on the arrest and Yahoo Celeb UK have contacted his reps for comment.
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