They are now saying the pagers were produced in Hungary, Israelli security have strong links in that country.. Pagers are now uncommon in most Western countries, but were widely used in the 1980s and 1990s.
Mr Hunter says his initial theory - based on injuries - suggests the blasts are "consistent with 1 to 2 ounces of high explosive. And you could certainly get that amount in a pager.
"We've seen ETA [a separatist group operating in Spain], we've seen the Colombian groups, we've seen the provisional IRA use pagers as explosive devices," he said.
