* Parcel bomb injured two at Swiss nuclear lobby on Thursday
* Italian anarchist group behind several attacks last year
* Swiss suspended nuclear power approvals over Japan
ZURICH, April 1 (Reuters) - An Italian anarchist group has claimed responsibility for the parcel bomb which injured two people in the offices of the Swiss nuclear lobby group on Thursday, the Swiss public prosecutor said on Friday.
Public Prosecutor Carlo Bulletti told a media conference the offenders were from the same background as those responsible for an attempted attack on an IBM research centre about a year ago, Swiss agency SDA reported on its website.
The so-called "Federazione Anarchica Informale" ("Informal Anarchist Federation") also claimed responsibility for parcel bombs sent to the Swiss and Chilean embassies in Rome last year.
Two female employees of Swissnuclear were taken to hospital with superficial burns and hearing damage after the parcel bomb exploded on Thursday. [ID:nLDE72U0R8]
Bulletti said the bomb was powerful, SDA reported.
Earlier this month, Switzerland suspended the approvals process for three new nuclear power stations so safety standards could be reviewed, after Japan's earthquake and tsunami sparked a disaster at the Fukushima nuclear power plant.
(Reporting by Silke and Koltrowitz; additional reporting by Pascal Lauener; editing by Michael Roddy)
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