According to a press release from the Slovenian EU presidency, Rupel pointed out that it was worth considering whether the Afghan government had truly understood the meaning of the Paris donor conference at which US$ 20bn had been raised to aid the country.
Rupel believes that poor government infrastructure prevents the provision of all the necessary services to the population.
Moreover, Afghan President Hamid Karzai's recent statements on possible military actions in Pakistan have international repercussions that cannot be overlooked, Rupel said and highlighted the importance of the 2009 presidential election in the country.
The international community must be assured that it is supporting a process and not individuals by pouring money into Afghanistan, Rupel said and expressed his full support for the activities of the UN secretary-general's special envoy Kai Eide.
The ministers meanwhile adopted a special statement on Afghanistan in which they pointed to the problems caused by terrorism, poverty, corruption and weak institutions.
The document also expresses support for the role of the UN and efforts for strengthening the government structures in the country as well as favourably assesses the work being done by international security forces.
The statement stresses the ministers' commitment to ensuring that presidential and parliamentary elections are conducted in a democratic fashion, and calls upon Afghanistan's neighbours to be cooperative.
Touching on Myanmar, Rupel expressed solidarity with the victims of Nargis cyclone and noted that the state of emergency was still far from over, especially because international humanitarian aid had still not reached around 100,000 affected victims, despited the somewhat improved access to the flooded areas.
Moreover, despite the pressing humanitarian crisis, there has been no improvement in the political situation in the country, said Rupel, labelling as extremely worrying several recent crack-downs by the authorities.
These include breaking up a peaceful demonstration on the occasion of birthday of Aung San Suu Kyi, the well-known dissident and Nobel Prize winner, during which several activists were arrested. This incident "deeply stirred the European public", Rupel said.
He also believes that the military junta's "poor handling of the crisis would, one might reasonably expect, rebound primarily on the authorities themselves, making change in Burma inevitable".
The G8 meeting is attended by the foreign ministers of the USA, Italy, France, Germany, the UK and Japan, and the Deputy Foreign Ministers of Canada and the Russian Federation. They will discuss Korea, Iran, the Middle East Peace Process, Sudan, Zimbabwe, Tibet and the Caucasus on Friday.