CoinWorld News reports that on April 19th (UTC+8), two Pakistani security sources revealed that US-Iran negotiations are expected to take place before Friday. The sources indicated that two US C-17 transport aircraft have landed at Nur Khan Air Base in Rawalpindi, raising the security level. The road connecting this base to Islamabad's Red Zone has been temporarily closed, reflecting heightened security. Meanwhile, the Serena Hotel and Marriott Hotel in Islamabad have begun evacuating guests and stopped accepting new reservations; the Serena Hotel was the site of the first round of US-Iran talks. All signs point to a new round of negotiations between the US and Iran about to commence.