Video circulating on social media appears to show individuals carrying yellow Khalistan flags clashing with a rival group, including people holding Indian flags. There were also isolated fist fights, videos show.
“We call on the Government of Canada to ensure that all places of worship are protected from such attacks,” Jaiswal added.
“We also expect that those indulging in violence will be prosecuted. We remain deeply concerned about the safety and security of Indian nationals in Canada.”
Beyond Nijjar’s killing, Canada has accused India of directing a broad campaign targeting Sikh activists on Canadian soil, which Ottawa says has included intimidation, threats and violence.
Trudeau charged the government of Indian Prime Minister Narendra Modi with violating Canadian sovereignty.
India has rejected the allegations.
On Saturday, New Delhi denied interior minister Amit Shah had plotted to target Sikh activists on Canadian soil, and said it had officially rebuked Ottawa over the “absurd and baseless” allegation.
New Delhi and Ottawa earlier this month each expelled the other’s ambassador and other senior diplomats.