Pakistan stepped up security measures in Islamabad's high-security Red Zone on Tuesday (April 21) as they prepare to host U.S. and Iranian delegates for a possible second round of peace talks.<br /><br />Armed rangers and police took up positions at checkpoints on roads leading to the Serena Hotel, frisking passengers and stopping vehicles in and out of the restricted area.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
