A magnitude 7.8 earthquake has struck southeastern Iran near the border with Pakistan, reportedly killing at least 45 people with casualties feared to rise, according multiple news sources. The US Geological Survey said on Tuesday that the epicentre of the quake was 86km southeast of Khash, Iran. According to the Iranian FARS news agency, 40 people were killed in the sparsely populated region. Another five people were reported dead in Pakistan. Al Jazeera's Imtiaz Tyab reports from Islamabad.