The crowds clapped as the cortege carrying the coffin of murdered soldier Drummer Lee Rigby began making its way to Bury Parish Church, where a vigil is being held ahead of his funeral tomorrow.
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Political parties across the country suspended their General Election campaigns following the Manchester Arena terror attack on Monday.
Investigators believe Mr Kushner has significant information relevant to their inquiry, officials told NBC News.
The men were detained as part of an investigation by MI5 and the Metropolitan Police's Counter Terrorism Command.