South Korea said the move "will contribute substantially to the alleviation of military tensions and the building of trust between the two Koreas."
Pyongyang said it would "protect the independent and creative life of the popular masses and make selfless, devoted efforts for them."
North Korea needs oil products to develop ballistic missiles and nuclear weapons, according to experts.
President Donald Trump tweeted the letter to him from North Korean supreme leader Kim Jong Un, who shared kinds words but little policy change.
Veteran U.S. diplomat Robert Gallucci said Trump's "tweeting on the subject of war and peace with North Korea isn’t the most useful thing in the world."
The pair have previously lashed out at one another
"Contrary to our military's suspension of joint Korea-U.S. military exercises, North Korea is conducting military exercises on a scale similar to previous years."
KCNA Watch has registered the lowest levels on its Threat Index since North Korean supreme leader Kim Jong Un came to power in 2011.
This year North Korea recognizes July Fourth differently.
The Sinuiju Cosmetics Factory is known for its special "spring fragrance."
“This can’t be true!!! President Trump told us ‘North Korea is no longer a nuclear threat.' He said he took care of it.”
President Trump said last week that 200 “fallen heroes” had been sent back to the U.S., but Pompeo told Senate none had as yet been received.
The defense secretary also defended the cancellation of joint military exercises, saying the move would create “increased opportunity for our diplomats to negotiate.”
Officials in Japan have asked if Tokyo’s missile defense project is still on after apparent North Korea thaw.
On June 12, the U.S. and North Korea leaders pledged to denuclearize the peninsula, yet satellite images show upgrades continue "at a rapid pace” at North Korea's Yongbyon facility.
South Korean President Moon Jae-in said it could create a “Northern Silk Road.”
This year's Day of Struggle Against U.S. Imperialism and Day of Victory in the Great Fatherland Liberation War may be unusually quiet in the hermit kingdom.
President Donald Trump and North Korean supreme leader Kim Jong Un may finally be getting along, but they have a long way to go before reaching peace.
It is no longer North Korea.
Trump said his relationship with North Korea "is very good" and that he expects "a total denuclearization, which is already starting to take place."
North Korea also released new posters that promote an April 27 summit meeting between Chairman Kim Jong Un and South Korean President Moon Jae-in.