Two regional officials say the US and Iran have signalled they will hold a new round of ceasefire talks in Islamabad as a fragile two-week truce was due to expire.Neither the US nor Iran has publicly confirmed the timing of the talks, with Iranian state television denying any official was already in Pakistan's capital.Pakistan-led mediators received confirmation that the top negotiators, US Vice President JD Vance and Iran's parliament speaker Mohammad Bagher Qalibaf, will arrive in Islamabad early Wednesday to