US President Donald Trump has announced he is raising tariffs on South Korean imports to 25% after accusing Seoul of "not living up" to a trade deal reached last year.

Axar.az informs, citing BBC, in a post on social media, Trump said he would increase levies on South Korea from 15% across a range of products including automobiles, lumber, pharmaceuticals and "all other Reciprocal TARIFFS".

Trump said South Korean lawmakers have been slow to approve the deal while "we have acted swiftly to reduce our TARIFFS in line with the Transaction agreed to".

South Korea said it had not been given official notice of the decision to raise tariffs on some of its goods, and wanted urgent talks with Washington over the issue.