It will be the third time Global Affairs Canada has summoned ambassador Oleg Stepanov this year.

Hundreds of people gathered outside the Russian embassy in London on Wednesday to protest after reports from human rights groups that up to 100 gay men are being held and tortured in "camps" in Russia's southern region of Chechnya.

Police in the southern Russian republic of Chechnya have rounded up more than 100 men suspected of homosexuality and that at least three have been killed, a Russian newspaper says.