Tensions continue to rise between India and Pakistan in the wake of last week’s deadly attack in Kashmir. The United Nations is now calling for restraint.

Gunmen opened fire on a group of tourists in Indian-administered Jammu and Kashmir on April 22, leaving 26 people dead.

Indian police are investigating the incident as a terrorist attack, but it is not yet clear who was responsible. The Indian government insists Pakistan was behind it, and says it may conduct a retaliatory attack. Islamabad denies the claim.

Troops from the two countries have since been exchanging fire along the de-facto border. The countries have also taken diplomatic measures and closed their airspace to planes from the other side.

UN Secretary-General Antonio Guterres held calls with Pakistani Prime Minister Shehbaz Sharif and Indian External Affairs Minister Subrahmanyam Jaishankar on Tuesday. Guterres urged both sides to de-escalate, saying confrontation would lead to catastrophe for the world.

AloJapan.com