With Assange inside, British police guard Ecuador embassy

LONDON: Julian Assange remained holed up in Ecuador's London embassy on Friday with police guarding its exits, as Britain warned that the diplomatic row over the WikiLeaks founder could go on for years.

Ecuador granted asylum on Thursday to Assange -- whose website enraged the United States by publishing a vast cache of confidential government files -- but Britain has vowed not to grant him safe passage out of the country.

British Foreign Secretary William Hague said his government was obliged under its own law to extradite the Australian national to Sweden, where he is wanted for questioning over alleged sex crimes. "No-one, least of all the government of Ecuador, should be in any doubt that we are determined to carry out our legal obligation to see Mr. Assange extradited to Sweden," Hague told a press conference on Thursday.

He admitted that the stalemate could continue for months or even years. Around ten British police were stationed outside the embassy early Friday, ready to arrest 41-year-old Assange if he leaves the building.

WikiLeaks condemned the continued police presence as "intimidation tactics". A handful of Assange's supporters camped overnight outside the embassy in London's plush Knightsbridge district, sleeping on pieces of cardboard.

Assange has not left the embassy since June 19, when he walked in and claimed asylum. WikiLeaks said on Twitter that he would give a statement in front of the embassy on Sunday, though it did not specify whether this would involve leaving the building and, if so, how he would do this without being arrested.

Under normal diplomatic procedures, embassies are considered the territory of the countries they represent and cannot be entered without permission. But Britain angered Ecuador on Thursday by suggesting it could invoke a domestic law allowing it to breach the usual rules and go in to arrest Assange.