Islamabad, Feb 18 (IANS) The toll in the toxic gas leak in Pakistan's port city Karachi rose at eight on Tuesday prompting Sindh Chief Minister Syed Murad Ali Shah to order evacuation of residents from the affected areas.

Heathrow apologised for the disruption and said extra staff had been drafted in to help with directing people to their gates  Jenny Nielsen tweeted pictures of whiteboards displaying handwritten flight numbers and destinations.  She said: “Computer systems down at Heathrow. No electronic tickets allowed, delays & no flight information on screens … Oh Blighty.”