Both the group of men arrested yesterday and the trade center suspects were assembling similar bombs, mainly composed of fertilizer, Federal officials said.

He uses it to change the pitch from high to low to create a sound similar to a dive bomb.

He was found with a bomb similar to the Lockerbie Toshiba radio-cassette device.

On Nov. 9, a similar bomb exploded in front of a downtown office building at 222 Broadway.

A similar bomb killed seven people in a Paris railway station on July 25.

This winter, Mr. Hudson said, he carried a similar bomb on international carriers, also without being detected.

A second glance showed that there were at least 40 similar bombs scattered about, most inside wooden crates.

Not only was the packaging and labeling of the bombs similar, their internal workings resembled each other.

The steel hydrogenation unit would contain some of the blast, but the net effect would be similar to a four- or five-thousand-pound bomb.

A similar bomb was found and defused in the Russian city of Ryazan on 22 September 1999.