The bomb was loaded onto a plane at an air base in Cyprus and is destined for Syria.
It comes just days after 22 people were killed by an improvised explosive device ar an Ariana Grande concert in the Manchester Arena.
This morning, the Labour leader Jeremy Corbyn gave a speech attacking UK foreign policy, listing it as one causes of terrorist attacks on British soil.
He said we must be brave enough to admit that "the war on terror isn't working," and that seeing soldiers on the streets on Britain shows "that current state isn't working so well".
Those causes certainly cannot be reduced to foreign policy decisions alone.
Over the past fifteen years or so, a sub-culture of often suicidal violence has developed amongst a tiny minority of, mainly young, men, falsely drawing authority from Islamic beliefs and often nurtured in a prison system in urgent need of resources and reform.
And no rationale based on the actions of any government can remotely excuse, or even adequately explain, outrages like this week’s massacre.
But we must be brave enough to admit the war on terror is simply not working. We need a smarter way to reduce the threat from countries that nurture terrorists and generate terrorism.
In the speech he said he can't deny a connection between "wars our government has supported or fought in other countries and terrorism here at home,but that "in no way reduces the guilt of terrorists who attack our children".
An informed understanding of the causes of terrorism is an essential part of an effective response that will protect the security of our people, that fights rather than fuels terrorism.
We must be brave enough to admit the ‘war on terror’ is simply not working.
We need a smarter way to reduce the threat from countries that nurture terrorists and generate terrorism.
He added that there the security failure is due to austerity and cutbacks.
There will be more police on the streets under a Labour government. And, if the security services need more resources to keep track of those who wish to murder and maim, then they should get them.
No government can prevent every terrorist attack. If an individual is determined enough and callous enough sometimes they will get through.
The speech so far has received largely positive reactions.
Army on the streets is a stark reminder that current policy is not working, says Jeremy Corbyn #GE2017
— Christopher Hope📝 (@Christopher Hope📝)
Mr Corbyn didn't take questions afterwards but will be interviewed by Andrew Neil on BBC One this evening.