US Vice President JD Vance's visit to Pakistan for a second round of negotiations regarding Iran has been postponed due to Tehran's failure to respond to US positions, according to a US official. The ceasefire between the US and Iran is set to expire shortly, and Iran has yet to confirm its participation in the talks. Pakistan, acting as a mediator, is in ongoing communication with Iranian officials and has urged both the US and Iran to consider extending the ceasefire. In a recent meeting, Pakistan's Foreign Minister Ishaq Dar emphasized the importance of dialogue between Washington and Tehran. Meanwhile, US President Donald Trump has expressed a desire not to extend the ceasefire, suggesting that military action may be imminent if a deal is not reached by the deadline. Key issues remain unresolved, including the reopening of the Strait of Hormuz, Iran's nuclear program, and sanctions.