July 26 (Reuters) - Sri Lankan shares extended losses to a third straight session on Tuesday, weighed down by losses in industrial and financial stocks.

* At the close of trade, the CSE All-Share index was down 0.12% at 7,630.17.

* Conglomerate Expolanka Holdings Plc and LOLC Development Finance Plc were the top losers on the index, falling 1.7% and 2.9%, respectively.

* Sri Lanka canvassed oil companies in petroleum-producing nations on Tuesday to import and sell their products in the Indian Ocean island, opening its market to resolve acute shortages of fuel.

* The island nation of 22 million is facing its worst economic crisis in seven decades, unable to pay for essential imports such as fuel and medicine due to a severe shortage of foreign exchange.

* On the CSE All-Share index, trading volume fell to 37.3 million shares from 46.3 million shares in the previous session.

* The equity market turnover was 693.9 million rupees ($1.92 million), down from 744.9 billion rupees in the earlier session, according to exchange data.

* Foreign investors were net sellers in the equity market, offloading 56.9 million rupees worth of shares, while domestic investors were net buyers, purchasing 657.9 million rupees worth of shares, the data showed.

* For a report on global markets, click ($1 = 361.0000 Sri Lankan rupees) (Reporting by Rama Venkat in Bengaluru; Editing by Shailesh Kuber)