A working group of legal experts is to be set up by the UK and Ecuadorian governments to try to break the deadlock over the future of WikiLeaks founder Julian Assange.
Mr Assange has been inside Ecuador's London embassy for almost a year, fearing he will be extradited to the United States if he travels to Sweden to answer allegations of sexual assault against two women.
Ecuador's foreign minister Ricardo Patino said it was "grossly unjust" that Mr Assange could not leave the embassy without being arrested.
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A man who met PC Keith Palmer said his murder "sent a shiver down my spine".
A search is underway for two brothers, aged 1 and 2, who were in their babysitter's car when it was stolen in California.
Officers said the girls were approached during separate incidents earlier this week in south London - possibly by the same suspect.