International envoy Kofi Annan travelled to Tehran to seek support in resolving the conflict in Syria, warning of a disaster if his peace plan fails.

Annan spoke after holding talks in Tehran on Tuesday with Ali Akbar Salehi, the Iranian foreign minister.

“Iran can play a positive role,” he said, adding he would continue to work with the Iranian leadership to resolve the crisis.

“There is a risk that the situation in Syrian gets out of hand and spreads  to the region,” Annan told a joint news conference with Salehi, who hailed Annan’s “neutrality”.

Before flying to Tehran, Annan said in Damascus on Monday he had agreed on a new approach with President Bashar al-Assad to stop the violence.

Last week, Annan acknowledged that international efforts to find a political solution for Syria had failed and called for a greater role for Iran, saying Tehran “should be part of the solution”.

Activists say the violence in Syria has killed more than 17,000 people since the conflict began in March 2011.