SEOUL, April 6 (Reuters) – North Korea’s test ⁠of ⁠a solid-fuel rocket engine ⁠is intended for intercontinental ballistic missiles (ICBM) built with ​carbon fibre to extend range and allow for delivery of heavier ‌and possibly multiple warheads, ‌South Korean lawmakers said on Monday. In March, North Korea ⁠conducted a ⁠ground test of a solid-fuel rocket engine that analysts ​believe is being developed for its latest ICBM. The new engine likely has greater thrust than the previous model it tested in 2024, which ​was already assessed as capable of striking anywhere in the ⁠mainland ⁠United States, they said. North ⁠Korea ​has conducted all its longer-range missile launches at a lofted trajectory to ​splash down the ⁠projectiles in the ocean off its east coast or to the east of Japan to test them without flying them for a distance they are designed for. North Korean media showed ⁠the airframe of the missile at the new engine test that ⁠was built with carbon fibre, which is lightweight while strong, allowing the projectile to carry multiple warheads, member of …