Germany, which is home to 600,000 Syrians, has "universal jurisdiction" laws that allow it to prosecute people for crimes against humanity committed anywhere in the world.
"Any poisoning of an individual through the use of a nerve agent is considered a use of chemical weapons."
Further airstrikes by unidentified aircraft on Iranian militias were reported near the Syria-Iraq border shortly after.
"Today I am announcing that the United States has concluded that the Assad regime used chlorine as a chemical weapon on May 19."
Neither was seriously hurt, but Pavin said they have been told by police not to return home.
Today, with growing turmoil in the Middle East, setting up a collaboration leading to the eventual elimination of nuclear weapons in the region appears out of the question.
Last June, the Investigation and Identification Team (IIT) was established by the OPCW's member states.
That a mass murderer like Assad continues to go unpunished helps explain why his regime remains in power.
"We are still gathering information on this incident."
The suspect, who has a Palestinian passport and a Italian residency permit, was arrested Wednesday morning in the city of Macomer.