THE HAGUE - The Libyan regime of Muammar Gaddafi possessed mustard gas shells which it had not declared as a member of the Organisation for the Prevention of Chemical Weapons, the OPCW said Friday. A team of OPCW inspectors had visited Libya this week to check a stock of weapons discovered by the country’s current rulers, the National Transitional Council, and previously undisclosed, a statement said. “At the request of the Libyan authorities the inspectors examined munitions, mainly artillery shells, which they determined are chemical munitions and hence declarable,” the OPCW said.