Big blast outside of Greece's main prison injures two (UPDATE)

Two people were wounded when a powerful bomb exploded outside Greece's top-security prison on Thursday, dpa reported.

An anonymous caller to the Greek daily Etheftherotypia and a private television station warned that a large explosion would go off at Greece's top security prison of Korydallos, located west of Athens.

Police said the mechanical device was discovered inside a garbage bin near the women's wing of the prison. The explosion was heard throughout Athens, and police immediately cordoned off the area to traffic.

One women was hospitalized after suffering injuries to her legs from shattered glass while a man was slightly injured from flying debris.

The blast caused damage to the exterior of the prison and nearby buildings.

In March, a 15-year-old boy was killed and his mother and sister wounded after a bomb exploded outside a building in central Athens.