No-one has been charged over the bombing in 1994
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The Argentine Government says it has received intelligence about possible terrorist attacks in the country.
Defence Minister Jose Pampuro said there could be attacks against US, British or Spanish targets.
He said vigilance had been stepped up at "strategic zones" following national and foreign intelligence warnings.
Bomb attacks on the Israeli embassy in Buenos Aires in 1992 and a Jewish cultural centre in 1994 left a total of 114 people dead.
Mr Pampuro told a radio station: "We received information from national intelligence services and two foreign intelligence services that Argentina could face some kind of attack".
Jewish community
He told the Clarin newspaper that there had been a similar alert four months ago, after which the government took action.
On that occasion it increased security around sensitive sites and imposed controls on people going in and out of the country.
Argentina is considered at risk of being attacked because it has a large
Jewish community and a border region with Paraguay and Brazil that is hard to police.
The US suspects this region of bankrolling Islamic militants.
The latest warning comes a day after Britain said it had received information of possible additional attacks in Turkey after suicide bombings this month killed dozens of people.