South Korean President Lee Jae Myung oversaw test-firing of a hypersonic glide vehicle, a missile flying at low altitudes, the Korean presidential office said in a statement on Thursday. The test follows North Korea's recent hypersonic missile test. Key points and original sources are listed below.

• South Korean President Lee Jae Myung oversaw test-firing of a hypersonic glide vehicle, a missile flying at low altitudes, the Korean presidential office said in a statement on Thursday.S1

• The test follows North Korea's recent hypersonic missile test. Tensions between the Koreas have increased after land mine explosions injured three South Korean soldiers near the border. North Korea denies responsibility.S2

• South Korea has flight-tested its first domestically developed hypersonic weaponS3S4