Iran’s Revolutionary Guard Corps warned on Sunday that any military ships approaching the Strait of Hormuz will be viewed as violating the two-week ceasefire and would be dealt with “harshly and decisively.”

In a statement carried by Iranian state media, the IRGC said the strait remains under the “smart management” and control of Iran’s navy and that the waterway remains open for non-military vessels, but that military ones would get a “forceful response.”

No word yet on whether U.K. will send minesweepers, as Trump said.