UK lowers attack threat level as police close in on bomber's network

By Michael HoldenLONDON (Reuters) - British intelligence experts no longer believe another attack isimminent as significant progress has been made by police investigating the suicide bomb attack on a pop concert in Manchester, Prime Minister Theresa May said on Saturday.Police hunting a suspected network behind Salman Abedi, the bomber who killed 22 people on Monday night, said they had made two further arrests overnight and that they had a greater understanding of how his device was made.May sa