The first appearance of a boar (this year - the above link to boar photos makes clear that this has happened in past years as well) was on September 29, when one weighing 130 kilograms appeared in Southeast Seoul and injured two people before swimming across the Han river. By the time 90 police officers were mobilized, it had swum back across the river. Around noon, after a 12 hour 'spree', it was surrounded by police and killed by a hunter. A photo of it swimming across the river is here. Another Joongang Ilbo article from 4 days later stated that Seoul City officials had said that the 160 cm long boar would "be stuffed and displayed at Gildong Ecology Park in Gangdong-gu, Seoul in about 40 days". The official added that "Wild boars are rarely seen in the city."
Just over 2 weeks after this statement, on October 19, another boar appeared in the vicinity of the Walkerhill hotel, likely having come down from Achasan. After an hour long chase by police, it tried to swim south across the Han river and drowned.
(Pic from Hankyoreh)
Five days later, on October 24, a 200-kilogram, 150-centimeter long pig appeared on the grounds of Changgyeong Palace in central Seoul, causing the evacuation of 300 visitors before it was quickly killed by hunters. It was assumed to have come from the mountains to Seoul's north; after three sightings in such a short time, suddenly wild pig experts found themselves getting phone calls from media outlets.
A naturalist said that with tigers extinct and bears nearly so in Korea, the pigs face fewer natural predators and have multiplied quickly.With no less than three sightings in almost as many weeks, it was time for the Korea Times to edge into the Joongang's niche, with an article titled 'Citizens on Alert Over Wild Boars', which informed us of Seoul city's plans to establish an emergency task force in November to cope with the appearances of wild boars. An official said
Choi Sung-gyu of the Korea Society for the Protection of Wild Animals said he thought that population pressure was driving more animals into the cities in search of food.
According to Environment Ministry, there are about 254,000 wild pigs in the country. They caused damage to crops estimated at 8.2 billion won ($7.7 million) last year. Some experts are urging a culling of the country's wild pig population.
"We will produce and distribute pamphlets and other materials that contain information on wild boars, such as their characteristics and habitats. Citizens should be well informed about how to handle the situation if they encounter boars"...So there you have it, just in case you were wondering what you should do if you see one. The article also mentioned that "[f]armers and professional hunters usually hunt wild boars around this time of year to prevent them from gorging on harvest-ready crops." I was wondering how legal this was until I found this article, from last January, which said that "wild-animal hunting has so far only been allowed if beasts were found to be damaging crops or threatening farm animals and human life". The article said that hunters would soon be able to hunt them if they were damaging tombs.
[A] researcher advised people not to run away or shout when they are faced with a boar on the street, adding that they should look straight into the boar’s eyes and promptly hide behind rocks or trees.
On October 27, a boar appeared in an apartment complex in Inchang-dong, Guri city, on Seoul's eastern border, and ended up in an underground parking garage before running off, presumably back into the hills next to the apartments.
This suddenly became international news when Reuters covered the story on October 28, with the memorable opening lines "This wild piggy went to an upmarket hotel. This wild piggy went to an historic palace. And all the wild piggies were chased by South Korean police." The use of the word "invasion" and its somewhat misleading descriptions of the 4 sightings make it sound as if dozens of them are running amok in Seoul on a daily basis, which simply isn't the case. It certainly makes for good entertainment however, which is likely why the story has appeared in online news all over the world (just google it).
The most recent boar sighting was not in Seoul, but in North Gyeongsang province, on October 30, where a man driving an SUV driving from Daegu north to Andong suddenly encountered about 20 boars crossing the highway as he rounded a curve. Five 6-month old wild pigs (each weighing 50 kg) were killed when he was unable to stop in time and hit them. A (not entirely pleasant, though censored) photo of the aftermath can be found here.
At any rate, if they're becoming such a nuisance, especially in the face of a lack of predators, allowing hunting to cull the population might not be such a bad idea. According to this site, in 2004 the whitetail deer population in my home province of Ontario was estimated to be between 350,000 to 400,000 (and one might imagine that in an area of the province the same size as South Korea, there would be less than 254,000, the estimated number of boars in Korea); 80,000 deer were killed by hunters in Ontario in 2003. I have doubts that the boar population here could recover as quickly as deer in Ontario do, seeing as the terrain and settlement patterns are very different, but the stories above (and Antti's comment below) make clear that the boar population is getting a little too large, for both city and country dwellers. I can't help but wonder, if they are such a problem in the countryside, that people living there might be annoyed that the boar problem is only getting attention because it's beginning to affect Seoul...
(Hat tip to Lost Nomad for the Reuters link)
Kotaji provides some more information about the intimate link between the Joongang Ilbo and wild boars.