The Police said that 11 people who were on the ferry sustained injuries and were admitted to hospital.
Hospital sources said that some of those receiving treatment were in critical condition.
The ferry was being used to transport people along the Kuringankerni lagoon from one end to the other as the Kuringankerni bridge was under repair.
Angry mobs vented their anger towards the incident by protesting on the street and attacking the house of an opposition MP.
Meanwhile, Eastern Province Governor Anuradha Yahampath directed the Commissioner of Local Government, Eastern Province, N. Manivannan to conduct an investigation into the incident. (Colombo Gazette)