Officials at Oxford university had to close a party down when a student turned up with his home made flame thrower.
Inigo Lapwood, 20, said he made the weapon using parts from a nail gun and diesel engine glow plug and a canister of butane gas.
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Tuesday's weather for the west of the region
Tuesday's weather for the east of the region
A further 85 buses are expected to arrive on Tuesday and Wednesday, with officials saying the entire operation will last at least a week.