http://news.bbc.co.uk/2/hi/uk_news/scotland/6257194.stm
As is typical with early reports, information is sketchy, confused and conflicting.
There is a car. It was on fire. Some people were in it, got out, got arrested after possibly pouring petrol onto their flaming car.
Some reports are talking about a gas canister being removed from the car.
This may be another car bomb attack gone wrong.