21.   Since yesterday, grocers report a run on flour and sugar while car owners have been filling up gas canisters at petrol stations.

22.   Some weapons, a gas canister detonated by remote control, for example, are harder to use but far more destructive.

23.   Television news reports said the bomb was made from a gas canister and packed with nails and screws.

24.   The bomb was designed around a gas canister wired to explode on contact when a train went by.

25.   The bomb near Lyons was designed around a gas canister wired to explode on contact when a train went by.

26.   The FBI said last week that the heat-generating gas canisters were used because less powerful tear-gas devices had been ineffective against a concrete bunker.

27.   The police responded with a volley of riot gas canisters and percussion bombs that could be heard across the lagoon on the neighboring island of Moorea.

28.   The troops encountered stiff resistance from inmates armed with weapons and gas canisters.

29.   There is as yet no evidence tying the gas canisters, or any other ordnance used by the FBI that day, to the conflagration.

30.   They were armed with rifles, pistols, and knives and pepper gas canisters, according to Palestinian police and witnesses to the arrest.