The BBC reports that two mail bombs exploded in separate incidents on Tuesday, one at the Swiss embassy and another at the Russian embassy in Athens, Greece, and that additional suspicious packages addressed to other embassies in Athens were also intercepted. No injuries were reported.
Tuesday's events follow similar incidents on Monday, when The Associated Press reported that one Greek worker at a parcel service was wounded after a mail bomb, addressed to the Mexican embassy in Athens, exploded, and that authorities intercepted additional mail bombs addressed to other embassies in Athens, as well as one addressed to French President Nicolas Sarkozy. On Tuesday, The AP reports, authorities were also investigating a package sent to the office of German Chancellor Angela Merkel.
The BBC, quoting local authorities in Greece, reported that this week's incidents appear to be connected, and that authorities suspect they may have been coordinated by an extremist group known as Conspiracy of the Cells of Fire. Two suspects have already been arrested.
The AP reports that there are no reported connections between the packages found in Europe this week and the explosive materials found aboard planes from Yemen, headed to the U.S., last week.
Last Friday, President Barack Obama announced that two planes from Yemen, both carrying explosive material, were headed to the U.S. The planes were intercepted in Dubai and England, and investigations into the plot continue this week.