President Donald Trump said Saturday that negotiations with North Korean dictator Kim Jong Un could begin soon and that the leader issued a “small apology” for testing short-range missiles.

“In a letter to me sent by Kim Jong Un, he stated, very nicely, that he would like to meet and start negotiations as soon as the joint U.S./South Korea joint exercise are over. It was a long letter, much of it complaining about the ridiculous and expensive exercises,” Trump wrote Saturday on Twitter.