May 5 (Reuters) - Futures for Canada's main stock index gained on Tuesday as oil prices ticked lower amid renewed tensions in the Middle East threatening a fragile truce.

June futures on the S&P/TSX index were up 0.5% at 6:58 a.m. ET (1058 GMT).

o The U.S. and Iran launched new attacks in the Gulf on Monday as they wrestled for control over the Strait of Hormuz with dueling maritime blockades.

o Brent crude futures slipped but held near $114 a barrel as investors monitored developments in the Middle East conflict. [O/R]

o Spot gold and silver rose 0.5% and 1%, respectively, though gains were capped as elevated oil prices kept inflation concerns alive. [GOL/]

o The Toronto Stock Exchange's S&P/TSX composite index ended lower on Monday as the Iran conflict escalated, stoking fears of higher inflation that could lead to interest-rate hikes this year.

o Investors are also watching corporate earnings in the United States and Canada for signs of how companies are navigating challenges arising out of the U.S.-Iran war.

o On the earnings front, exchange operator TMX Group's first-quarter revenue and profit beat analyst estimates.

o Real estate firm Dream Impact Trust's first-quarter net loss widened from a year earlier, as commercial income fell.

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(Reporting by Tharuniyaa Lakshmi in Bengaluru; Editing by Joyjeet Das)