NEW DELHI — Tens of thousands of people resumed mass demonstrations in Bangladesh’s capital on Saturday, intensifying their demands for more severe punishment for war criminals from the country’s 1971 liberation war, while also demanding justice for the slaying of a blogger who had been a leading organizer of the protests.

The coffin bearing the body of Rajib Haider, an architect and blogger, was carried through the crowd in a public funeral at Shahbagh, a major intersection in Dhaka, the national capital. Bangladeshi television showed thousands of people kneeling in prayer, chanting slogans or waving banners bearing Mr. Haider’s image. The crowd were estimated at more than 100,000 people.

Prime Minister Sheikh Hasina visited Mr. Haider’s family on Saturday to express her condolences. Mr. Haider’s body was discovered Friday night near his home, after he had been savagely stabbed. His family has told the Bangladeshi news media that they believed that he was killed for his role in the protests and his outspoken criticism of the fundamentalist Islamist political party Jamaat-e-Islami.

“Haider’s killing occurred at a time when the youngsters have awakened and united the whole nation,” the prime minister told Bangladeshi reporters during her visit to the family’s home. “Let me promise that we will not spare the killers.”