Iran has been struck by its most powerful earthquake for nearly 40 years :
with tremors felt across Pakistan, India and the Middle East.
The epicentre of the 7.8 magnitude quake was near the south-east city of Khash,
close to the Pakistani border,
the US Geological Survey said.....
Offices were evacuated in Abu Dhabi and buildings swayed in Delhi, India.
The 7.8-magnitude quake, the most powerful to hit Iran for more than 50 years :
caused 35 deaths in Pakistan's Balochistan province....