BUCHAREST, April 3 (Xinhua) -- No financial commitments to the missile shield have been made so far, Romanian Prime Minister Calin Popescu Tariceanu told a press conference on Thursday.

    The issue of the missile shield financing will be thoroughly analyzed, including the financial capacity of each NATO country to contribute to the project, he said.

    "It is a matter of joint effort that all have to assent to," Tariceanu added.

    The allied leaders decided NATO should develop "options for a defense architecture" to also cover the states that are not within the protection range of the U.S. missile shield project, according to NATO Secretary General Jaap de Hoop Scheffer.

    The options will be discussed in 2009, Scheffer stressed.

    NATO leaders agreed Thursday to look at a "bolt-on system" connected to the planned U.S. missile shield in Poland and the Czech Republic.

    The planned U.S. system can cover most of the territories of the European allies. Romania, Bulgaria, Greece and Turkey are either totally out of range or only part of their territories are covered since they are too close to the potential source of missile threats.

    The idea is that NATO will be able to bolt on a short- and medium-range missile defense system, which it is developing, to the planned U.S. system.