Meanwhile, South Korea's Joint Chiefs of Staff said Tuesday's test was more advanced
than the missile Pyongyang tested last week, reaching a velocity of more than 10 times the speed of sound.
One US administration official said the current assessment is the missile most likely released a glide vehicle, but it's not clear how successful it was. A maneuverable glide vehicle is when the front end of the missile detaches and can maneuver and change course.
Multiple officials also cautioned that analysis remains ongoing, with one adding that it is not clear if the capabilities demonstrated in the test are immediately relevant to North Korea's operational military capacity.
Tuesday's projectile was launched from Jangang province, near the border with China, and landed in the ocean between the Korean Peninsula and Japan
, its flight covering a distance of more than 700 kilometers (435 miles) and reaching a height of 60 kilometers (37 miles), according to South Korea.
North Korea said Wednesday that it had successfully test-fired a hypersonic missile, according to its state media, making it the third alleged test of such a weapon by the Kim Jong Un
regime. Kim attended the launch, state media reported.
Despite the advanced launch, the Biden administration does not plan to reach out to North Korea in a substantive way before the South Korean elections in March, administration officials said.
The weapons test this week comes as diplomacy between the US and North Korea has been halted for more than a year. Though the Biden administration has tried to reach out to North Korea a handful of times, there has been no real response.
State Department spokesman Ned Price told reporters on Wednesday that the Biden administration's policy toward North Korea remains "unchanged" in the face of the recent missile launches. The administration still believes that the "only effective" way to bring about peace on the Korean Peninsula is through dialogue, he said.
US officials have watched, and quietly supported, as South Korea has tried to engage North Korea in many ways over the last year. But South Koreans do not think there is a high chance of diplomacy before the elections, and Biden administration officials agree.
Administration officials believe that North Korea is now solely focused on two things: the coronavirus pandemic and advancing its weapons systems, the officials said.