Twitter suffered from yet more security jitters on Tuesday night, after another attack left the site briefly unavailable.

The outage lasted only about 30 minutes, from about 2020 (BST) and was far less severe than an attack last Thursday that took out the site for around two hours and left it offering impaired services for days afterwards.

Twitter is still investigating the cause of Tuesday's brief outage, which followed a site update that may (or may not) have played a role in subsequent events. ®

Related stories

• Facebook app flaws create Trojan download risk (21 September 2009)
• Facebook to hire like it's 1999 (24 August 2009)
• Twitter profile image spam touts smut (20 August 2009)
• Twitter is mainly pointless babble and other rubbish (13 August 2009)
• Georgian blogger calls for Twitter attack probe (10 August 2009)
• Twitter hack spawns spam and scareware scams (10 August 2009)
• Twitter meltdown raises questions about site stability (7 August 2009)
• Researcher: Twitter attack targeted anti-Russian blogger (7 August 2009)
• Updated Twitter goes titsup (6 August 2009)
• Marines mobilize to block Web 2.0 (4 August 2009)
• Twitter, Facebook urged to improve security (22 July 2009)
• Twitter's underwear exposed after Google Apps hack (15 July 2009)
• Hijacked Twitter accounts spread Koobface worm (10 July 2009)
• Month Of Twitter Bugs exposes microblogging flaws (3 July 2009)
• Twitter Trends exploited to promote scareware (4 June 2009)
• Twitter hit with rogue anti-virus scam (2 June 2009)