Pakistan, Afghanistan trade fire as Islamabad prepares to host US-Iran talks

KABUL, March 30 (Reuters) - Afghanistan and Pakistan have traded heavy fire, both sides said, days after they announced a temporary pause in fighting, escalating tensions in the volatile region as Islamabad prepares to host talks between the U.S. and Iran.The border clashes came on Sunday, the day Pakistan hosted regional powers to discuss de-escalation in the war in the Middle East, with an announcement that Islamabad could host the talks in coming days.