'Very important' items found in Manchester attack investigation

"Very important" items have been found in property searches after the Manchester attack and "significant" arrests have been made, say police.Two more people were arrested overnight in Greater Manchester, following other raids and arrests on Wednesday in Manchester, Wigan and Nuneaton in Warwickshire.A Whitehall source told Sky News that bomber Salman Abedi was one of many former "subjects of interest" (SOI) for MI5, and apparently not being actively investigated.