South Korea Joint Chiefs of Staff: ”Over 310 filthy balloons released by North Korea since the night of the 9th”

On the 10th, South Korea's Joint Chiefs of Staff revealed that "North Korea launched more than 310 'dirty balloons' into South Korea between the night of the 9th and the morning of the 10th."
At around 9:40 p.m. on the 9th, the Joint Chiefs of Staff sent an email to reporters visiting the Ministry of National Defense, stating, "North Korea has launched a dirty balloon.
A Joint Chiefs of Staff official said on the 10th, "Currently, there are no further dirty balloons from North Korea," and "The balloons contain rubbish such as waste paper and plastic.
"The analysis showed that there were no safety hazards," he said. North Korea said it had sent "filthy balloons" into South Korea twice, at the end of last month and the beginning of this month, on the pretext that a South Korean non-governmental organization had scattered leaflets toward North Korea.
After that, a South Korean private organization released large balloons with leaflets attached on them between the 6th and 7th of this month, and North Korea announced three flights between the night of the 8th and the early morning of the 9th.
North Korea has launched more than 30 filthy balloons into South Korea, bringing the total number of filthy balloons launched into South Korea over the past four rounds to more than 1,600.