South Korea's presidential office has convened a meeting to discuss North Korea's latest launches of what appeared to be short-range ballistic missiles. Pyongyang also apparently tried to jam GPS signals.

Members of the presidential National Security Office and other officials met on Thursday morning to analyze the situation and discussed how to respond.

The South Korean military says North Korea fired more than 10 projectiles believed to be short-range ballistic missiles from the Sunan area near Pyongyang around 6:14 a.m. on Thursday.

The presumed missiles reportedly flew toward the Sea of Japan. At least one of the projectiles is believed to have traveled more than 350 kilometers.

Yonhap news agency reports that they appeared to be short-range missiles that the North calls "super-large rocket shells."

South Korea's Joint Chiefs of Staff said the military also detected an attempt by North Korea to jam GPS signals on Thursday morning.

The jamming attempt reportedly originated from the north side of the Northern Limit Line, the de-fact inter-Korean sea border in the Yellow Sea.

The military said similar jamming attacks were detected on Wednesday as well. It said there was no impact on South Korea's forces. But local media reported some civilian ships experienced problems with using GPS.

Earlier on Monday, North Korea failed to launch what it calls a military reconnaissance satellite.
On Tuesday, the North started sending a large number of balloons filled with trash and excrement over the border to the South.

The South Korean military says it remains vigilant against possible further provocations by the North.