And our Yoo Li-an is at a polling station in Seoul's Dongjak-B district in what's been identified as a key race in this election.
This is the only district in Seoul voting today and looks to be a very tight race.
Li-an, how is it there are you seeing many voters come to cast their ballots?
Hi Mark, Jin-joo, after the morning rush with people casting votes before heading off to work,.. things have been pretty slow around here.
This district -- Dongjak-B in Seoul -- is one of the most hotly contested battlegrounds in this by-election and it has, in the past,… been a major swing region.
When looking at the most recent parliamentary elections,.. candidates from the ruling Saenuri Party and main opposition party split Dongjak-B winning twice each.
In this district, ruling Saenuri Party candidate Na Kyung-won, who is aiming to become a third-time lawmaker,…is taking on minor opposition Justice Party candidate Roh Hoe-chan, who is expected to absorb most of the liberal votes, since the opposition camp last week joined forces to field just one candidate.
The two were neck-and-neck in the last opinion polls released last week, showing Na of the ruling party with less than a one percentage point lead.
Now as for what voters would like to see from their elected leader, many talked about the investigation into April's deadly Sewol-ho ferry disaster.
"From the investigation process for Yoo Byung-eun to the Sewol-ho ferry law, I felt frustrated that the ruling and opposition parties have been unable to come to terms. I voted for someone who could voice their opinions strongly at the National Assembly.
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"The winning candidate should first focus on revitalizing the local economy. The public is also hurting from Sewol-ho ferry tragedy. I hope our politicians do their best to relieve us of our pain."
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It's encouraging to see people exercising their democratic right to vote. What's the voter turnout nationwide at this hour, and how is the final voter turnout expected to effect the results?
As of eleven a.m. voter turnout stood at 10.3 percent.
The National Election Commission expects the final voter turnout today to be in the lower 30 percent range, which is, about average for by-elections like this.
Traditionally,… older voters turn out in greater numbers than younger people.
And because the older generation typically leans toward the conservative party,.. the participation rate of 20- to 30-year-olds will be a variable in the ultimate results.
Also Mark,… the weather will play a role as well.
It's been very hot the last couple of days.
The mercury is expected to touch a sweltering 32 degrees Celsius this afternoon in Seoul and it'll be even hotter in other parts of the country.
High temperatures typically keep people at home and out of the polling booth, so we'll see how that factors in as well.
This has been Yoo Lian reporting live from a polling station in Dongjak-B district.