Via the IRNA:
An informed source with Iran’s Supreme National Security Council said Tuesday that Iran’s response to the proposed package of Group 5+1 will be presented in matter of hours.
The source told IRNA that ambassadors of Germany, France, Britain, Russia, China and Switzerland will receive Iran’s response.
The sources further said Ali Larijani, secretary of the council, will deliver the answer.
Update: The response has been delivered. No details have emerged.