(Reuters) - Loblaw Cos Ltd (>> Loblaw Companies Limited), Canada's largest grocer, reported lower-than-expected quarterly revenue in the face of increasing competition from expanding U.S. rivals.

Wal-Mart Stores Inc (>> Wal-Mart Stores, Inc.) and Target Corp (>> Target Corporation) have expanded in Canada over the past year, challenging Canadian retailers such as Loblaw, Canadian Tire Corp Ltd (>> Canadian Tire Corporation Limited) and Metro Inc (>> Metro, Inc.).

Loblaw, which has just completed its C$12.4 billion acquisition of Shoppers Drug Mart Corp, said total revenue rose just over 1 percent to C$7.29 billion.

Retail same store sales grew by about 1 percent compared with a growth of 2.8 percent in the year-ago quarter.

Excluding one-off charges, the company earned C$139 million, or 49 Canadian cents per share, up slightly from C$134 million, or 48 Canadian cents per share a year earlier.

Analysts on average had expected the company to earn 46 Canadian cents on revenue of C$7.32 billion, according to Thomson Reuters I/B/E/S.

The company raised its quarterly dividend by half a cent to 24.5 Canadian cents from a previous 24 cents.

Loblaw shares closed at C$45.80 on Tuesday on the Toronto Stock Exchange.

The stock has risen about 7 percent in the past three months, outperforming the stocks of Loblaw's smaller rivals Empire and Metro. Metro's stock has risen about 2 percent, while that of Empire has fallen about 6 percent in the same period.

($1 = 1.0966 Canadian Dollars)

(Reporting by Ashutosh Pandey in Bangalore)