1.   But the devices bore a striking resemblance to the others, made from blue gas canisters filled with nails and bolts.

2.   A Scotland Yard spokesman said there had been no claims of responsibility, but that the device bore the hallmarks of the IRA.

3.   Police said earlier that the device bore the hallmarks of the IRA.

4.   The device bore all the hallmarks of the IRA, Scotland Yard announced.