Maliki's comments came after a number of instances of violence left about 170 people dead across Iraq since Tuesday, the BBC reported.
"Sectarianism is evil, and the wind of sectarianism does not need a license to cross from a country to another, because if it begins in a place it will move to another place," Maliki said.
"Strife is knocking on the doors of everyone, and no one will survive if it enters, because there is a wind behind it, and money, and plans," he added.
On Saturday in Iraq, at least five anti-al-Qaida Sunni militiamen and three security forces personnel were killed in two separate attacks.
In the first attack, gunmen open fire on a checkpoint near the city of Tikrit, killing five members of the anti-al-Qaida militia Awakening Council.
Later, three army intelligence personnel were shot and killed by gunmen near an anti-government protest camp in the city of Ramadi, police said.