11.   In particular detectives are looking into a Belgian connection in the attack after discovering that the camping gas canister used fitted Belgian specifications rather than French ones.

12.   One of the most concrete leads so far stemmed from the type of bomb used, a device made up of explosives packed into an empty camping gas canister.

13.   Police said the bomb was built from a small camping gas canister hidden in a rubbish bin near the Arc de Triomphe and designed to cause maximum injury.

14.   Police said the bomb was built from a small camping gas canister, hidden in a rubbish bin near the Arc de Triomphe and designed to cause maximum injury.

15.   The bomb was contained in a camping gas cannister, a method used by the GIA in Algeria in the past.

16.   The bomb that killed seven people in the Paris subway this week included a standard camping gas bottle, police said Thursday.

17.   The bomb, made from a camping gas bottle and toilet paper soaked with an inflammable liquid, went off mid-morning at the school in Peronne.