Iran and Pakistan will form a joint quick reaction force to combat militant activity on their shared border, Iranian President Hassan Rouhani said on Monday during a televised press conference with Pakistan's Prime Minister Imran Khan.

Khan arrived in Iran on Sunday to discuss security and regional issues, Iranian state TV reported, a day after Islamabad urged Tehran to act against militants behind killings in Pakistan's Baluchistan province.

Relations between Iran and Pakistan have been strained in recent months, with both sides accusing each other of not doing enough to stamp out militants allegedly sheltering across the border.