Missing munitions - what's been pinched?

The BBC is reporting that a couple of cases of munitions has been stolen from a train in Warrington.

[QUOTE=BBC]
They are described as being rectangular plastic tubes, approximately 4ft (1.2m) in length.
[/QUOTE]

What could they be?

The Independent says it’s reported to be anti-tank mines.

Anti Tank Mimes

Like this?

Ah-ha!

Thanks guys.

Some further digging reveals it is a shipment of L9 bar mines.

Wow, 100kg of RDX is missing!