SEOUL: North Korea is believed to have conducted its first nuclear test in a horizontal tunnel near its northeastern missile base, a South Korean lawmaker said on Monday, quoting intelligence officials.
The officials said in a report to parliament that the test appeared to have been conducted in a 1,200 feet mountain northwest of its Musudanri missile base in Hwadaeri, according to lawmaker Chung Hyong-Keun.
He quoted an intelligence official as saying: "In consideration of the height of the mountain, the test appeared to have been done in a horizontal tunnel."
Chung was speaking to reporters after North Korea announced it had successfully conducted an underground nuclear test, with no radiation leakage.
