Feb.17 (GMM) Organisers of the Singapore grand prix have issued an apology over the bungled ticketing sales for this year's inaugural race.

Sunday marked a third consecutive day of frustration for potential race-goers, as the system for selling the first 70,000 trackside vantage points again failed.

Race officials refused to confirm how many patrons have successfully bought tickets so far.

Organisers Singapore GP did, however, place full page adverts in the major Straits Times newspaper - and others - proclaiming 'We Are Sorry' in huge print.

"We know the frustrating time that many F1 fans have experienced over the past few days," the ads read.

"The ticketing system has improved considerably, but there may still be some delays at peak periods.

"We apologise sincerely for the frustration and inconvenience that the system problems have caused.

"Rest assured we are doing everything possible to improve the system further", they added.

Similar ads were not placed on websites or in foreign media.