The body of North Korean leader Kim Jong-un's half-brother has yet to be claimed by next-of-kin.
US official says the engine could be used to launch an intercontinental ballistic missile.
It is unclear whether the reported presence of vehicles indicates preparation for a potential missile launch.
Seoul has issued the warning amid concerns that the North could conduct a nuclear test in the coming weeks.
US authorities will also bring charges against Chinese middlemen, who allegedly helped North Korea plan and execute the cyberheist.
US defence secretary warns that resisting additional funds would dent the country's security.
The military drills have been met with threats and rocket launches from the North.
The US Air Force's sophisticated bomber was flanked by multiple fighter jets.
The South Korean defence ministry said it was ready to respond to any North Korean provocations.
Choe Myong-Nam said his country wanted to be able to strike an enemy first.
The Korean Central News Agency accused the US of using 9/11 terror attack as an excuse to infringe upon sovereign states.
US Secretary of State Rex Tillerson recently said military strike was an option against Pyongyang threats.
President Trump is expected to receive North Korea policy recommendations within weeks.
Impeached leader Park apologises to public as she faces lengthy interrogation over corruption scandal.
North Korean state-run media released a threatening video vowing a 'hail of fire' against the US
North Korea has a stockpile of nuclear weapons and is developing intercontinental ballistic missiles.
One of the miners trapped was rescued 10 days after the accident.
This comes a day after Pyongyang announced it carried out the ground test of a new high-thrust rocket engine.
The North Korean leader said Pyongyang has now given a 'new birth' to the rocket industry.
Some Japanese officials continue to deny women were forced into sexual slavery during WW2.
Talks were dominated by concerns over North Korea.
Japan's Radar 5 Information Gathering Satellite (IGS) was flown into space atop the H-IIA rocket.