DHAKA: Twitter’s chief executive Dick Costolo has admitted that the company ‘sucks’ when it comes to dealing with abuse and trolling on the service.

In a memo to staff, leaked to tech news website the Verge, he said that bullying behaviour on the network was driving users away.

He promised tougher action to deal with abusers, reports the BBC.

A series of high-profile users have quit Twitter in recent months, citing online abuse.

In his memo to staff, Costolo wrote, ‘We suck at dealing with abuse and trolls on the platform and we’ve sucked at it for years’.

‘It’s no secret that the rest of the world talks about it every day. We lose core user after core user by not addressing simple trolling issues that they face every day.’

His words echo a December blog post in which the company admitted that it ‘was nowhere near being done making changes in this area’.

It promises that, in coming months, it will bring in further user controls and improvements in the way users can report abusive accounts.

BDST: 2032 HRS, FEB 05, 2015