US citizen detained by North Korea as Japanese ships join war games

University teacher Tony Kim held at airport while trying to leave countryTrump calls Chinese and Japanese leaders, White House briefing plannedAmid rising tensions between North Korea and the US, Pyongyang has detained a US citizen, officials said on Sunday, bringing to three the number of Americans now being held in the country. Related: Julie Bishop hits back at North Korea as Labor backs 'harder-edged' US stanceRelated: Mike Pence in Australia says US and allies ready to tackle North KoreaCon