Security tightened ahead of summit in Hiroshima next month after incident on Saturday

Japan’s prime minister, Fumio Kishida, has vowed to ensure the safety of politicians and officials attending this year’s round of G7 meetings, days after he escaped unharmed after apparently being targeted in a pipe bomb attack.

The incident on Saturday came as foreign ministers began three days of talks in Japan, this year’s G7 president, that will be followed by other high-level meetings culminating in the leaders’ summit in Hiroshima in May.