Islamic State extremists bombarded an Assyrian Church in the town of Karemlis in Iraq's north-western Nineveh province near Mosul city, Assyrian International News Agency (AINA) reported Monday.
"Daesh jihadists detonated a number of explosive devices inside the church on Sunday afternoon," human rights activist Ghazi Shamoun told AINA, referring to Islamic State by its Arabic acronym.
"The church was destroyed completely," he added.
The Assyrian town of Karemlis and other Christian areas have been evacuated completely following the Islamic State invasion of Nineveh in June 2014. Thousands of Christian families fled their hometowns and took shelter in the Iraqi Kurdistan region.
"The terrorist group has destroyed dozens of Assyrian churches and archaeological sites in Nineveh in a bid to eliminate the historical identity of the area," Shamoun said.
Islamic State regards Christians as heretics.
Around 1,000 archaeological sites in Syria and Iraq have been attacked by Islamic State and other Islamist groups, according to reports.