Foreign ministers from the Group of Seven major developed countries plan next week to uphold their goal of achieving a world without nuclear weapons, according to a Japanese source, but the move could be challenged by the United States.

Ministers and officials from the G-7, which includes Japan, the U.S., Britain, Canada, France, Germany and Italy, will meet Monday and Tuesday in the central Italian city of Lucca with a focus on whether their foreign ministers can maintain the group's resolution toward nuclear abolition expressed last year in Hiroshima.

It remains unclear how the U.S. will respond. President Donald Trump has signaled he will strengthen U.S. nuclear capabilities after reviewing former President Barack Obama's efforts toward the elimination of such weapons.