A letter bomb exploded Friday at an office of Italy's tax collection agency, wounding the organization's director. Police said an Italian anarchist group that sent a letter bomb to Deutsche Bank in Frankfurt earlier in the week claimed responsibility for the attack.

A Rome police official, who spoke on customary condition of anonymity, said Friday's bomb was contained in a yellow bubble envelope mailed to the director's attention at an Equitalia office on the outskirts of Rome.

The tax agency director, identified by the government as Marco Cuccagna, underwent surgery after suffering injuries to a hand and his face, caused when a glass desktop was shattered by the explosion, Equitalia official Angelo Coco told the ANSA news agency.

Italy's Informal Anarchist Federation claimed responsibility. The claim included in the package was "very similar" to that which was contained in the Deutsche Bank letter bomb, which didn't explode, a police official said.

The group, known in Italy as FAI, had warned in its Deutsche Bank claim that there would be three "explosions" in its latest campaign. Last year around Christmas, the anarchist group sent package bombs to three Roman embassies, injuring two people.

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