From correspondents in Seoul
(news.com.au) Agence France-Presse
NORTH Korea has test-fired two more missiles, South Korea's defence ministry says, further stoking tensions sparked by its nuclear standoff with the international community.
"North Korea launched two missiles this morning," the Joint Chiefs of Staff said in a statement. It follows a series of missile launches earlier this week.
The missiles were launched between 8am and 8.30am local time, 9.30am (AEST) from Kitdaeryong Base near the eastern port of Wonsan into the East Sea (Sea of Japan), it said.
"The military, on the basis of a strong joint defence alliance with the United States, is fully prepared to fend off any threats or provocations by the North," it said.
An unidentified government official quoted by Yonhap news agency said both of the missiles were believed to be Scuds with a range of 500km, which would allow the North to strike most of South Korea.
North Korea fired four short-range missiles on Thursday into the Sea of Japan but the range of those missiles was estimated to be only around 120km.
"The Scuds fired today impose greater security threat to us because of their longer ranges," the official was quoted as saying by Yonhap.
"Thursday's missile tests were apparently made as part of a military drill but today's launches, which came on the eve of the US Independence Day, are believed to be aimed at political purposes," the official said.
This week's missile launches were the first military action the hardline communist state had taken since the United Nations on June 12 imposed tougher sanctions for its May 25 nuclear test.
In the days after its atomic test - the second since 2006 - the North also fired a volley of short-range missiles.
In response to the UN resolution tightening curbs on its missile and atomic activities, it vowed to build more nuclear bombs. It also renounced the truce brokered on the Korean peninsula after a civil war in 1950 to 1953.