feb 14 reuters  sri lankan shares ended marginally higher on monday extending gains to a third straight session supported by financial and communication services stocks  ceylinco insurance plc cinscm and dialog axiata plc were the top boosts to the index gaining nearly 25 and 83 respectively  foreign investors were net sellers in the equity market offloading shares worth 809 million rupees 39901356 while domestic investors were net buyers picking up shares worth 222 billion rupees exchange data showed  the trading volume fell to nearly 73 million shares from 952 million in the previous session  the islandnation reported 628116 coronavirus cases and 15808 deaths as of sunday data from the countrys health bureau showed  about 6438 of sri lankas population has been fully vaccinated according to data from johns hopkins university reporting by rama venkat in bengaluru editing by vinay dwivedi