President Donald Trump says the U.S. is "having very productive talks with North Korea" about a summit next month with Kim Jong Un.

Read alsoTrump casts doubt on planned summit with North Korean leader – media

"We are having very productive talks with North Korea about reinstating the Summit which, if it does happen, will likely remain in Singapore on the same date, June 12, and, if necessary, will be extended beyond that date," he tweeted.

As UNIAN reported earlier, Trump had canceled the meeting with Kim Jong Un in Singapore, scheduled for June 12.

In a letter to Kim released by the White House, Trump said he decided to cancel the meeting "based on the tremendous anger and open hostility displayed in your most recent statement," according to USA Today.

The parties were supposed to be debating the denuclearization of the Korean peninsula.