N Korea threatens attack if US boosts presence North Korea is reportedly threatening to launch a pre-emptive military strike against US forces.
The warning comes as North Korea reactivates its nuclear facilities.
The US is considering reinforcing its military presence in the region by deploying B52 and B1 bombers to the western Pacific.
Pyongyang says any such move will prove America is planning an invasion.
According to BBC reports, North Korea's foreign ministry deputy director Kim Pyong Gap has threatened to launch a pre-emptive attack on American forces if more troops are sent to the Korean Peninsula.
North Korea says it has reactivated its nuclear facilities.
In a statement, the Central News Agency said the work is for peaceful purposes only.
Officials in the US reject the explanation, saying they believe the nuclear plant is capable of producing weapons grade plutonium.
