Oct 11 (Reuters) - Sri Lankan shares snapped a three-day winning streak to close lower on Monday, as losses in heavyweight industrial and financial stocks weighed, while bonds fell after the central bank scrapped a buyback plan.

* The CSE All-Share index closed 0.31% lower at 9,649.26.

* Conglomerate Expolanka Holdings Plc and Commercial Bank of Ceylon Plc were the top drags on the index, falling 1% and 3.1%, respectively.

* The equity market's turnover was 2.58 billion rupees ($12.90 million), according to stock exchange data https://www.cse.lk/pages/daily-market-summary/daily-market-summary.component.html.

* Trading volume on the exchange fell to 115.4 million shares from 177.7 million shares in the previous session.

* Foreign investors were net sellers in the equity market, offloading shares worth 149 million rupees, as per exchange data.

* Sri Lanka's government bonds suffered their biggest drop in nearly seven weeks after the central bank scrapped a plan to buy back a chunk of the country's debt on the cheap after default fears pounded prices.

* As of Sunday, the island-nation has reported 526,383 total confirmed coronavirus cases and 13,331 deaths from COVID-19, data from the country's health bureau showed https://hpb.health.gov.lk/covid19-dashboard.

* About 56.69% of the country's population is fully vaccinated so far, according to data from Johns Hopkins University https://coronavirus.jhu.edu/region/sri-lanka.

* For a report on global markets, click

* For a report on major currencies, click ($1 = 200.0000 Sri Lankan rupees) (Reporting by Anuron Kumar Mitra in Bengaluru; editing by Uttaresh.V)