Italy police
Italy policeReuters

An explosion was reported outside a post office near a United Nations building in Italy on Friday morning. There are no reports of any casualty or injuries.

A car however is said to be badly damaged in the incident. Shortly after the blast, a large-scale evacuation was conducted as emergency services cleared Aventino district of Rome. Initial investigation suggests that a letter bomb may have been used by the perpetrators.

Investigators believe that the blast may have been caused by two remote-controlled devices, according to Il Giornale reports.  The target of the blast however is still not clear.

Police have said that there is no immediate suspicion of Islamist terrorism in the incident.

The devices used in the explosion had flammable liquid and were placed between cars parked in Via Marmorata, which links the River Tiber with the Pyramid of Caius Cestius in central Rome.

Officials believe that the incident could have been an "act of protest."

The security officials suspect certain anarchist groups to be behind the blast as they have carried out similar firebombings in the past.

Security has been increased in the Italian capital after a series of Islamic State (ISIS) associated terror attacks across Europe. The extremist group, in one of its propaganda videos, had also singled out Rome as one of its prime targets.

Similar letter bombs have also been found in other European countries including Paris, Germany and Greece. The bombs were sent by a Greek anarchist group to European Union (EU) ministers and financial institutions.

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