Updated — Oct. 10, 7:49 a.m. ET
Seoul's military said North Korea and South Korea exchanged cross-border machine-gun fire Friday, Yonhap reported.
A video of the balloon launch, via Reuters, can be seen here:
Meanwhile, speculation is continuing to mount around the whereabouts of leader Kim Jong Un after he missed a key political anniversary ceremony, the BBC reported.
His name was not on the list of invitees who visited a mausoleum to mark the 69th anniversary of the country's ruling party. It's the first time in three years he has not taken part in the annual tradition.
Kim has not been seen in public since Sept. 3, the longest hiatus since he came to power in the reclusive nation in 2011.
There has been speculation surrounding his grip on authority, with some saying that he has effectively lost control of the country.
However, many others say the absence is down to poor health. State news recently showed Kim walking with a limp, and last month claimed he was in an "uncomfortable physical condition".
South Korean officials said that, despite the claims of a loss of power, Kim remains in charge in North Korea, Yonhap reported.
In a press briefing, Seoul unification ministry spokesman Lim Byeong-cheol said: "It seems that Kim Jong Un's rule is in normal operation."
He added: "With regard to his specific health conditions, our government has no information to confirm yet."