President Donald Trump is “content” with leaving the naval blockade of ships heading to or coming from Iranian ports “until the Iranians show they are serious about making a deal,” a White House official told the Washington Examiner on Wednesday.

The president announced the U.S. and Iran had agreed to a two-week ceasefire last week pending Iran’s reopening of the Strait of Hormuz, a vital waterway off their coast that they have shut down since the start of the conflict. The first round of U.S. and Iranian negotiations took place last Saturday in Islamabad, Pakistan, though it ended without a long-term deal.