US officials are trying to determine what type of missile was used Sunday, but initial reports said it could be a medium-range missile, according to a White House foreign policy Adviser. 
He added that the White House has no plans of sending nuclear weapons to South Korea or the area. 
"Other actions would have been taken by the US" if it had been a nuclear test, the adviser said. 
US Vice President Mike Pence, who is in the area as part of previous scheduled trip, was briefed on the launch, administration officials said. Pence and President Donald Trump have been in contact, aides to the vice president said.
"The President and his military team are aware of North Korea's most recent unsuccessful missile launch. The President has no further comment," US Defense Secretary James Mattis said. 
US Pacific Command said it tracked a missile launch at 5:21 p.m. ET and said the missile blew up almost immediately. 
"It was a land-based missile," US Pacific Command spokesman David Benham told CNN. 
At this point, US military officials don't believe the missile had intercontinental capabilities, a US defense official told CNN. The official said the missile blew up so quickly there is limited data. 
North Korea's actions come as tensions on the Korean Peninsula have spiked to alarming levels.

Source: QNA