North Korea fired two "new-type" projectiles from its east coast, the South Korean military said Friday — the country's third launch in just over a week, but one that U.S. President Donald Trump looked to play down — as a trade and history clash between Tokyo and Seoul threatened joint efforts to rein in Pyongyang's nuclear program.

Both projectiles flew around 220 km at an altitude of about 25 km, according to the South Korean Joint Chiefs of Staff, which said they flew at a top speed of Mach 6.9.

What the North fired appeared to be a new type of short-range ballistic missile, sharing similar flight characteristics with those fired on Wednesday, officials from the U.S. and South Korea said, adding that more analysis was needed.