Platanillo Update

23 September 2013

Amerisur Resources Plc ("Amerisur" or the "Company")

Platanillo Update

Amerisur Resources Plc, the oil and gas producer and explorer focused on South America, is pleased to announce that subsequent to the lifting of the road blockages associated with the national strikes in Colombia over recent weeks, the Platanillo field has now been brought back onto production.

The Company has designed a detailed field start up plan and intends to ramp up production while carefully monitoring well performance.

ENDS

Competent person: Technical information in this announcement has been reviewed by John Wardle Ph.D., the Company's Chief Executive. John Wardle has 29 years' experience in the industry, having worked for BP, Britoil, Emerald Energy and Pebercan, and is a trained drilling engineer.

ENQUIRIES:

Ben Brewerton/Natalia Erikssen, Tel: +44 (0)207 831 3113

FTI Consulting

Martin Eales/Pierre Schreuder Tel: +44 (0)207 653 4000

RBC Capital Markets

Investec

Chris Sim / Ben Colegrave Tel: +44 (0)207 597 4000