(CNN) -- Somali pirates demanded a $7 million ransom for a British couple kidnapped aboard their yacht last week, a British agency said Friday. The British government says it won't pay. "The government will not make substantive concessions for hostage takers, including the payments of ransom," the British Foreign and Commonwealth Office said. Paul and Rachel Chandler, who were snatched last week from their yacht in the Indian Ocean, had been held aboard a Singaporean cargo ship hijacked by pirates. They have been moved to a hijacked Spanish ship that pirates have stocked with more supplies and armed men, a local journalist in contact with the pirates said Friday.
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NEW: British government says it won't pay ransom
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Pirates move kidnapped British couple to hijacked Spanish ship
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Pirate source says ship has more men and weapons on board
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British couple left Seychelles for Tanzania on October 21
In the conversation, Rachel Chandler confirmed only that they had been moved from the @placeholder cargo ship, but not their current location, the network reported.