In a tweet on Monday, the prime minister said he wanted to thank the nation for peaceful observance of Ashura in the country.
"I want to thank our nation for the peaceful observing of Ashura in the country. However, unfortunately, information has come to me of elements who tried to ignite flames of sectarianism on this occasion and I will be taking very tough action against them," Imran tweeted.
Youm-e-Ashura was observed nationwide on Sunday to pay homage to Imam Hussain and other martyrs of Karbala amid strict security arrangements. Processions were carried out in various cities as thousands of security personnel protected the mourners.