North Korea fired a suspected long-range missile toward the sea Thursday in what would be its first such test since 2017, according to its neighbors’ militaries, raising the ante in a pressure campaign aimed at forcing the United States and other rivals to accept it as nuclear power and remove crippling sanctions.

The launch, which extended North Korea’s barrage of weapons tests this year, came after the U.S. and South Korean militaries said the country was preparing a flight of its biggest-yet intercontinental ballistic missile.

South Korea’s Joint Chiefs of Staff didn’t immediately say whether the weapon involved in the launch was ballistic or how far it flew. But Japan’s Deputy Defense Minister Makoto Oniki said the missile, which travelled 1,100 kilometers (660 miles) while reaching a maximum altitude of over 6,000 kilometers (3,728 miles), likely was a new ICBM. The flight details suggested that the missile was fired on a higher-than-usual angle to avoid reaching the territorial waters of Japan.

Japan’s coast guard, which warned vessels in nearby waters about the potential for falling objects, said it believed the missile flew about an hour before landing in waters outside the country’s exclusive economic zone. There were no immediate reports of damage to boats or aircraft.