Pakistan’s special representative for Afghanistan, Mohammad Sadiq Khan, arrived in Iran on Sunday for talks with senior Iranian officials, state-run news agency IRNA reported.

The discussions are expected to focus on the situation in Afghanistan and ways to expand cooperation between Tehran and Islamabad, according to the report.

The visit comes as relations between Pakistan and the Taliban have grown increasingly strained amid rising insecurity in Pakistan’s Khyber Pakhtunkhwa and Balochistan provinces. Islamabad accuses the Taliban of sheltering the Tehreek-e-Taliban Pakistan, or TTP, which has carried out cross-border attacks.

The trip follows a joint meeting on Afghanistan held in New York two days earlier on the sidelines of the 80th session of the UN General Assembly, where the foreign ministers of Iran, China, Pakistan and Russia discussed regional security concerns.