By Nobuhiro Kubo TOKYO (Reuters) -North Korea fired two ballistic missiles early on Sunday, authorities in neighbouring countries said, the seventh such launch by Pyongyang in recent days that added to widespread alarm in Washington and its allies in Tokyo and Seoul. Officials in the South Korean capital have said the uptick in the North’s missile launches could signal it is closer than ever to resuming nuclear testing for the first time since 2017, with preparations observed at its test site for months. Both of Sunday’s missiles reached an altitude of 100 km (60 miles) and covered 350 km (218…