NEW YORK — Trump’s son-in-law Jared Kushner has warned North Korea that he will consider the country’s nuclear weapons as a “massive” sanction if it launches an attack, according to a report.

Kushner’s comments to the Financial Times are the latest salvo in an escalating war of words between the two nations, which have been at war since the North’s fourth nuclear test in January and a second failed missile test last week.

Kerry met with Kim Jong Un at a luxury hotel in Pyongyang last month.

It is not clear if Kim responded.

Kurt Volker, the senior White House adviser for North Korea, said Kim had offered to “negotiate” on an eventual resolution to the North Korean crisis, but it was “too early” to tell whether Pyongyang would take that offer seriously.KUSHNER’S WORST THREAT TO NUCLEAR NUCLES Trump’s new national security adviser, Kurt Volker , is the latest in a series of advisers to the President to weigh in on the escalating crisis in North Korea.

Volker was named deputy national security advisor in May after White House Chief of Staff John Kelly stepped down.

The two men spoke on Sunday in Seoul.

North Korea said it had successfully tested a miniaturized nuclear warhead, but Washington has repeatedly warned it is unlikely to have a reliable reliable nuclear delivery system.

The U.S. military has said it is focused on developing an intercontinental ballistic missile capable of hitting the U.s. mainland.