According to the JCS, at least one projectile was fired from near Pyongyang the previous day, just a day after a similar launch, marking a second consecutive day of provocations.
But the projectile fired on Tuesday disappeared shortly after launch, suggesting it failed.
"We are analyzing the detailed specifications of the projectile in cooperation with U.S. intelligence authorities," a JCS spokesman said.
With North Korea's state media remaining mum about the launches, Jang Kum-chol, the country's first vice foreign minister, instead made clear that the North has no intention of softening its stance toward South Korea in a statement the same day.
Jang said that last Monday's remarks by North Korean leader Kim Jong-un's sister, Yo-jong, in which she described South Korean President Lee Jae Myung as "frank and broad-minded," were rather a "clear warning" over what she called drone infiltrations by the South.
Earlier, South Korea had interpreted her remarks as a "positive" sign for improved relations between the two Koreas, but Jang dismissed it as Seoul's "wishful thinking."
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