p44.jpgA man carrying two backpacks scaled a perimeter fence at London's Heathrow Airport earlier today, "sprinted onto the runway" and ran towards a plane triggering a major security alert. He was tackled by airport police and arrested. Agence France-Presse has more:

"A man ran towards an Emirates flight," a police spokeswoman told AFP, as television pictures showed police vehicles scrambling to deal with the situation. "He has been removed. We believe he was acting alone." 

And from the BBC

Up to 20 emergency services vehicles were reported to have been sent to the scene. The rucksack was recovered and explosives officers called in as a precaution.

A Metropolitan Police spokeswoman said: "A man was arrested and is currently in custody. A bag has been recovered."