April 10 (UPI) -- U.S. President Donald Trump accused Iran of breaching the cease-fire earlier this week, saying it was reneging on its promise to allow oil tankers to transit the Strait of Hormuz and suggesting Tehran might be doing it deliberately.

Trump made the comments on his Truth Social platform late Thursday, 24 hours before U.S.-Iran negotiations were due to get underway in Pakistan.

"Iran is doing a very poor job, dishonorable some would say, of allowing Oil to go through the Strait of Hormuz. That is not the agreement we have!" he wrote.

Earlier in the evening, he cautioned Tehran against forcing ships to pay tolls to get through the vital shipping lane connecting the Persian Gulf and the Gulf of Oman.

Iran "better not be charging fees to tankers," he wrote in a post.