Twitter's chief executive Dick Costolo has reportedly admitted that the micro-blogging platform "sucks" at addressing trolling and instances of abuse online, a leaked memo said.
Costolo admitted in a memo sent to the company's staff that the bullying behavior on the network was driving users away, reported the BBC.
He wrote that the company sucked at dealing with abuse and trolls on the platform and has "sucked at it for years."
However, Costolo promised the company will bring in further user controls and improvements in the way users report abusive accounts in coming months.
The statement came after a series of high-profile users quit the platform in recent months, citing online abuse.