In statements to the local Yonhap news agency, the capital's head of traffic claimed that the service violated South Korean law.
Last Friday, the city passed an ordinance saying that anyone who reports the local activities of the US firm will be rewarded with $910 (roughly Rs. 57,300).
However, the company has continued to operate in the city despite several suits by the government against Uber Korea, the company's South Korean subsidiary, and a proposal to revise the country's law to bring the service to an end.
According to Kim, the service is illegal not only because it uses unlicensed taxi drivers but also because it does not conform to the regulations regarding cab rates.
"Uber goes against a just economy based on sharing and participation within a legal framework," Kim told Yonhap, adding that the company was also unable to ensure passenger safety.
"The city will punish drivers and rental cars that cooperate with Uber through a system of monetary rewards to return order to the transport sector," Kim warned.
The ire of taxi drivers in Seoul has been on the rise ever since the app was launched in the country in August 2013.
Uber, which started its services in San Francisco in 2010, is currently under investigation in several countries, including India, that have banned the service saying it provides unfair competition to professional cab drivers, among other reasons.
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