BEIJING - Chinese authorities in the northeastern city of Dandong have told tour agencies to halt overland tourism into North Korea, local travel agents said on Wednesday, as Pyongyang whips up war rhetoric following weeks of tension on the Korean peninsula."All (tourist) travel to North Korea has been stopped from today, and I've no idea when it will restart," a travel agent in Dandong told Reuters by telephone."I think it is because of the situation in North Korea," she said, declining to give her name.Four other travel agencies confirmed they had stopped tours that use the land border crossing into North Korea at Dandong. One cited a notice from the government tourism bureau in Dandong. There was no indication it was a nationwide tourism ban.The border remains open to commercial traffic, the travel agencies said.