BAGHDAD — A string of deadly explosions and other attacks shook Iraq on Thursday, with bombings in Baghdad and the northern city of Kirkuk resulting in the most fatalities. Over all, nearly three dozen people were killed and more than 100 were wounded, according to security officials.

By the standards of Iraq — where attacks occur daily, although at a much diminished rate compared with the height of the war — the wave of violence on Thursday was not extraordinary. But it was a reminder, after weeks of relative calm, that an organized insurgency remained active.

A series of explosions in the village of Al Malhaa, on the outskirts of Kirkuk, left 9 people dead and 24 wounded, according to an official in Kirkuk, a city divided among three ethnic groups often at odds with one another: Arabs, Kurds and Turkmens.

In Baghdad, nearly 15 people were killed in a handful of explosions, including one on Palestine Street aimed at the convoy of the minister of health, Majeed Hamad Amin. He was unharmed, but two bystanders were killed, an official said.