Intelligence: N Korea sank the S Korean naval ship on direct orders from Kim Jong-il

The attack on the 1,220-ton Cheonan, which sank on March 26 with the loss of 46 of its 104 crew, was carried out in retaliation for a skirmish between warships of the two nations' navies in November of last year, South Korea claims.

The South Korean government has refused to comment officially on the reports but Defence Minister Kim Tae Young told a parliamentary session that the military believed that the sinking was a deliberate act by North Korea.

Officials in military intelligence say they warned the government earlier this year that North Korea was preparing a suicide-squad submarine attack on a South Korean ship.

"Military intelligence made the report to the Blue House [the presidential office] and to the Defence Ministry immediately after the sinking of the Cheonan that it was clearly the work of North Korea's military," a military source said.

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