The Ambassador for Ukraine to Sri Lanka, resident in New Delhi, Igor Polika, and Secretary to the Ministry of Foreign Affairs of Sri Lanka Prasad Kariyawasam exchanged Instruments of Ratification of the 'Treaty on Mutual Legal Assistance in Criminal Matters' and the 'Treaty on Transfer of Sentenced Persons' at that country's Ministry of Foreign Affairs in Colombo on December 5, according to Sri Lanka's news website Colombo Gazette.