DHAKA, Bangladesh — Vandalism and arson directed at Hindu temples and homes continued over the weekend in Bangladesh, as crowds in various parts of the Muslim-majority country appeared to target its largest religious minority group.

Many of the acts were minor. Late Saturday or early Sunday, for instance, Hindu idols were defaced in temples in the north and south of the country, according to the police.

But Hindu communities are increasingly unnerved, said Anjan Kumar Deb, the vice chairman of Nasirnagar subdistrict, northeast of Dhaka, the capital, where an angry Muslim crowd ransacked 15 temples and scores of homes on Oct. 30.

Fifty-three people have been arrested in connection with those crimes.

India expressed “grave concern” over the attacks, with Sushma Swaraj, the external affairs minister, instructing Delhi’s ambassador to the country to visit the prime minister of Bangladesh, Sheikh Hasina.