I wasn't going to post on today's attack at Glasgow Airport until more was known, just as I haven't yet posted on the discovery of two unexploded car bombs yesterday in London, but here's the latest from the BBC:
A car on fire has been driven at the main terminal building at Glasgow Airport.
Eyewitnesses have described a Jeep Cherokee being driven at speed towards the building with flames coming out from underneath.
They have also described seeing two Asian men, one of whom was on fire, who had been in the car.
Strathclyde Police said two people had been arrested and detained in connection with the incident.
The airport has been evacuated and all flights suspended following the incident at 1515 BST.
Prime Minister Gordon Brown has chaired a meeting of Cobra -- the emergency committee.
Home Secretary Jacqui Smith said the national terrorism threat level had been raised to its highest level of "critical", meaning an attack was expected "imminently".
For a Q&A of what is known so far about London and Glasgow, see here.
We'll have more as more is known, along with reaction from news outlets and from around the blogosphere. Stay tuned.