(CNN) North Korea has threatened to cancel the planned summit between President Donald Trump and Kim Jong Un scheduled for June 12 in Singapore, saying the US should carefully consider the fate of the upcoming meeting, in view of what it calls "provocative military disturbances with South Korea," North Korea's state news agency reported early Wednesday local time.

The warning comes as KCNA reported North Korea has suspended talks with South Korea because of a joint military drill conducted by South Korea and the US.

"We are aware of the South Korean media report. The United States will look at what North Korea has said independently, and continue to coordinate closely with our allies," White House press secretary Sarah Sanders said in a statement.

However, the White House was caught off guard by the reports, according to aides. One official affirmed an assertion from the State Department that it has received no information from Pyongyang about the status of the talks.

State Department spokeswoman Heather Nauert defended joint US-South Korean military exercises Tuesday and said the US had not heard of any disruptions to either the planned exercises or the upcoming summit.

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