"We urge the authorities in the UK and Europe to work collaboratively to ensure a smooth transition to a new economic relationship between the UK and the EU, including by clarifying the procedures and broad objectives that will guide the process," International Monetary Fund Managing Director Christine Lagarde said.
The IMF has taken note of the decision of the United Kingdom, she said in a statement.
"We strongly support commitments of the Bank of England and the ECB to supply liquidity to the banking system and curtail excess financial volatility.
In another statement, the Finance Minister of G7 countries and governors of their central banks said they respect the intention expressed today by the people of the United Kingdom to exit from the European Union.
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"We are monitoring market developments following the outcome of the referendum on the UK's membership of the EU," the statement said.
"We affirm our assessment that the UK economy and financial sector remain resilient and are confident that the UK authorities are well-positioned to address the consequences of the referendum outcome," the G7 statement said.
"We stand ready to use the established liquidity instruments to that end," G7 said adding the US will continue to consult closely on market movements and financial stability, and cooperate as appropriate.