San Francisco, Aug 31: Twitter said Friday the account of chief executive Jack Dorsey had been "compromised" after a series of erratic and offensive messages were posted.
The tweets containing racial slurs and suggestions about a bomb showed up around 2000 GMT on the @jack account of the founder of the short messaging service before being deleted.
Some of the tweets contained the hashtag #ChucklingSquad which was believed to indicate the identity of the hacker group.
The messages contained racial epithets, and included a retweet of a message supporting Nazi Germany.
"We're aware that @jack was compromised and investigating what happened," a Twitter spokesperson said.
A barrage of comments fired off on the platform questioned why the Twitter co-founder didn't secure his account with two-factor authentication, and how disturbing a sign it was that the service wasn't to keep its own chief safe on the platform.
"If you can't protect Jack, you can't protect... jack," one Twitter user quipped.
The news comes with Dorsey and Twitter moving aggressively to clean up offensive and inappropriate content as part of a focus on "safety." "This might be the only way to get rid of racist tweets on this platform," a Twitter user commented.
Twitter recently announced they would meet with Manchester United representatives regarding calls for more to be done in preventing racist abuse of footballers on social media platforms.
British-based security consultant Graham Cluley said the incident highlighted the importance of two-factor authentication, where a user must confirm the account via an external service.
"Everyone should ensure they have 2FA enabled, use unique password, and double check what apps they've linked to their accounts," Cluley tweeted.
"Hard to say at moment how he was compromised, but one of those reasons most likely."
Cybersecurity researcher Kevin Beaumont said the account appeared to have been hijacked "via a third party called Cloudhopper, which Twitter acquired about 10 years ago and had access to his account." Cloudhopper enables users to send tweets on their phones via SMS.
The incident raised fresh concerns about how social media users -- even prominent ones -- can have their accounts compromised and used for misinformation, a point highlighted by Canadian member of parliament Michelle Rempel Garner.
"Between bots, trolls and abuse, I've been skeptical about @Twitter as a viable platform for some time now," Rempel Garner wrote.
"But the fact it took the platform's owner (@jack) about 30 min to get his hacked account under control is deeply problematic, and makes me worry as an elected official."
We’re committing Twitter to help increase the collective health, openness, and civility of public conversation, and to hold ourselves publicly accountable towards progress.
— jack ??? (@jack) March 1, 2018
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Cairo (AP): Iran swiftly reversed course on reopening the Strait of Hormuz, reimposing restrictions on the critical waterway on Saturday after the US said it would not end its blockade of Iran-linked shipping.
Iran's joint military command said on Saturday that “control of the Strait of Hormuz has returned to its previous state ... under strict management and control of the armed forces.” It warned that it would continue to block transit through the strait as long as the US blockade of Iranian ports remained in effect.
The announcement came the morning after US President Donald Trump said that even after Iran announced the strait's reopening on Friday, the American blockade “will remain in full force” until Tehran reaches a deal with the US, including on its nuclear programme.
The conflict over the chokepoint threatened to deepen the energy crisis roiling the global economy after oil prices began to fall again on Friday on hopes the US and Iran were drawing closer to an agreement. Roughly one-fifth of the world's oil passes through the strait, and further limits would squeeze already constrained supply, driving prices higher once again.
Control over the strait has proven to be one of Iran's main points of leverage and prompted the United States to deploy forces and initiate a blockade on Iranian ports as part of an effort to force Iran to accept a Pakistan-brokered ceasefire to end almost seven weeks of war that has raged between Israel, the US and Iran.
Iran said it fully reopened the Strait of Hormuz to commercial vessels after a 10-day truce was announced between Israel and the Iranian-backed Hezbollah militant group in Lebanon. But after Trump said the blockade would continue, top Iranian officials said his announcement violated last week's ceasefire agreement between Iran and the US and warned the strait would not stay open if the US blockade remained in effect.
A data firm, Kpler, said movement through the strait remained confined to corridors requiring Iran's approval.
US forces have sent 21 ships back to Iran since the blockade began on Monday, US Central Command said on X.
Truce in Lebanon could help US-Iran peace efforts
------------------------------------------------------------
The ceasefire in Lebanon could clear one major obstacle to an agreement. But it was unclear to what extent Hezbollah would abide by a deal it did not play a role in negotiating, and which will leave Israeli troops occupying a stretch of southern Lebanon.
Trump said in another post that Israel is “prohibited” by the US from further strikes on Lebanon and that “enough is enough” in the Israel-Hezbollah war.
The State Department said the prohibition applies only to offensive attacks and not to actions taken in self-defence.
Shortly before Trump's post, Israeli Prime Minister Benjamin Netanyahu said Israel agreed to the ceasefire in Lebanon “at the request of my friend President Trump,” but that the campaign against Hezbollah is not complete.
He claimed Israel had destroyed about 90 per cent of Hezbollah's missile and rocket stockpiles and added that Israeli forces “have not finished yet” with the dismantling of the group.
In Beirut, displaced families began moving toward southern Lebanon and Beirut's southern suburbs despite warnings by officials not to return to their homes until it became clear whether the ceasefire would hold.
The Lebanese army and UN peacekeepers in southern Lebanon reported sporadic artillery shelling in some parts of southern Lebanon in the hours after the ceasefire took effect.
An end to Israel's war with Hezbollah was a key demand of Iranian negotiators, who previously accused Israel of breaking last week's ceasefire with strikes on Lebanon. Israel had said that the deal did not cover Lebanon.
The fighting has killed at least 3,000 people in Iran, more than 2,290 in Lebanon, 23 in Israel and more than a dozen in Gulf Arab states. Thirteen US service members have also been killed.
