A man reads a newspaper with a front page article referring to anticipated U.S.-Iran peace talks, at a stall in Islamabad on Wednesday. Pakistani Prime Minister Shehbaz Sharif thanked President Trump for extending a ceasefire with Iran and indefinitely pushing back the end of the two week truce. Asif Hassan/AFP via Getty Images hide caption

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Asif Hassan/AFP via Getty Images

Iran attacked at least three commercial ships in the Strait of Hormuz Wednesday, just hours after President Trump extended a ceasefire with Iran while continuing a U.S. naval blockade of the strait.

The standoff in the critical shipping chokepoint has put the possibility of U.S.-Iran peace talks in jeopardy.

Vice President Vance was due to lead a delegation to Islamabad for a second round of talks, but the plan dissolved after Iran said it would not be attending.

Iranian President Masoud Pezeshkian said in an online statement Wednesday that Iran welcomes dialogue but "breach of commitments, blockade and threats are…