International Atomic Energy Agency deputy head Olli Heinonen said talks with Iran on Thursday over its nuclear drive were “constructive” and that some “important steps” were made.

At least 18 people were killed and 24 others injured in a road accident Friday when a truck slammed into a bus full passengers in northern Iran.

Iran and the UN nuclear watchdog have reached an agreement on how to conduct negotiations over Tehran’s nuclear program, and the two sides said that they would continue talks to come up with a final solution.