Pakistan's army chief arrives in Tehran as Rubio signals 'slight progress' in peace talks

US President Donald Trump has described the stop-start negotiations this week as teetering on the "borderline" between a deal and renewed attacks.

• Pakistan's army chief is on a diplomatic visit to Tehran
• US Secretary of State Rubio reports slight progress in peace negotiations
• Trump describes negotiations as on the borderline between deal and renewed attacks
• Diplomatic efforts intensifying for regional stability