Article published on the 2008-06-03 Latest update 2008-06-03 11:10 TU
The beef issue has become a major challenge to new President Lee Myung-bak, as his approval ratings have plummeted to just over 20 percent.
A spokesman for the president said he told a weekly cabinet meeting that "it is natural not to bring in meat from cattle 30 months of age and older, as long as the people do not want it."
South Korea used to be a major market for US beef, but it banned most imports in 2003 after an outbreak of mad cow disease, or BSE.
Lee's government agreed to relax most of the restrictions in April, under pressure from the United States which said it would not back a bilateral trade deal without concessions on beef.
The move sparked public anger, with almost daily rallies since the agreement was announced, which intensified over the weekend.
Protesters claimed that US beef is not safe and said Lee is ignoring their concerns.
The timing of the deal, just hours before a summit between Lee and US President George Bush at his Camp David retreat, further fuelled anger.