The UN chief on Sunday urged world powers and regional actors not to interfere in Libya’s internal affairs, calling for stronger support for efforts to achieve a lasting cease-fire in the country.

In remarks to the Libya conference in Berlin, Secretary-General Antonio Guterres stressed the need for “immediate and decisive action” to prevent a full-fledged civil war in Libya, and also warned against regional escalation.

He expressed hope that Sunday’s conference will contribute to a sustainable cease-fire and create an international environment that will help Libyans solve the conflict in a “Libyan-led” and “Libyan-owned” inclusive political process.

Read more: World should vow non-interference in Libya: UN chief