COPENHAGEN, Denmark (AP) — Sweden says it will refrain from signing a United Nations convention on nuclear weapons because the treaty "in its current form is not ready."

Swedish Foreign Minister Margot Wallstrom says the text has "no clear definition of nuclear weapons and there are a number of issues that must be answered."

Wallstrom told a news conference Friday there is no majority in Sweden's parliament, the Riksdagen, to sign the convention. The country's two-party, center-left minority needs the backing of a majority to sign it.

She added the government will continue "its nuclear disarmament efforts" and will continue "to work for a ban on nuclear weapons" as an observer.

Wallstrom said "the goal of the government's work is clear: Sweden is a strong voice in the world for a nuclear-free world."

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