People across much of the planet were having problems accessing Twitter on Thursday, a day before the 2012 Olympic Games are expected to cause a spike in use of the micro-blogging site.

The San Francisco-based company acknowledged the problem, saying in a statement that its engineers are "currently working to resolve the issue," although it didn't go into any further detail.

Visitors to the site were greeted with a half-formed message partially in code saying that "Twitter is currently down."

The fields where a reason for the outage and a deadline for restoring service were apparently meant to go were filled with computer code.

Sluggishness or outages were reported from countries in North America, Europe, Asia, Latin America, the Middle East, and Africa.