SEOUL, March 26 (Xinhua) -- Tens of thousands of people on Sunday crowded to an amusement park in the South Korean capital of Seoul for free admission, causing a stampede that injured 35 people.

    Some 50,000 visitors, most of which are teenagers, were gathering around the area near the Lotte World in southeast Seoul earlier Sunday for entering the park, according to local TV station YTN.

    Sunday is the first day of the park's six-day event to grant free entry and access to all rides to the first 35,000 visitors.

    The stampede occurred when the opening time of the park was approaching.

    The 35 injured, mostly teenagers, were rushed to a nearby hospital, said YTN.

    Television footage showed crowed people were screaming and shouting when the accident suddly occurred.

    Moreover, those who did not get permission to enter the park abreacted their anger by hitting advertisement of the park, the television footage showed.

    Shortly after the stampede, police dispatched 400 officers to the site to control the situation.

    The Lotte World said it had placed 210 private safety guards and established safety measures in cooperation with related authorities, but police said the organizers did not request help.

    The incident forced the park to cancel the free entry event, according to a notice posted on the park's website.

    The Lotte World decided to offer the event as an apology for the accidental death early this month of a man riding a roller coaster at the park.

    The Lotte World, which opened in July 12, 1989, has claimed it is the world biggest indoor amusement park with some 115,284 square meters large. It receives some 8 million visitors from South Korea and the world every year. Enditem