SLOVYANSK, Ukraine — Hundreds of residents of this eastern Ukrainian city under the control of pro-Russian militants came to the Orthodox Church of the Holy Spirit on Tuesday for the funerals of three men killed in a shootout at a roadblock on Sunday.

Many used the service to vent their anger at the interim government in Kiev, the capital, which they hold responsible for the deaths of the men. Mourners also accused the leadership of endorsing a violent campaign of terror to subdue eastern Ukraine.

As church bells rang, the grieving cried, “Glory to the heroes of Donbass,” a reference to the region. The bodies of the men, who were identified as local residents, were carried in open, tulip-draped coffins down the steps of the church and toward buses with signs reading, “Slovyansk Remembers Its Heroes.”

Pro-Russian forces contend that the three men were killed by members of the Ukrainian nationalist group Right Sector, which helped to overthrow the government in February. Kiev, in turn, attributed the violence to provocateurs who wanted to further embitter people in the eastern part of the country against the interim government.