Perhaps in an attempt to satisfy the United States, Maliki's speech lacked some of the religious rhetoric of previous addresses. But he attacked his political opponents for assisting countries in the region in a "sinister" plot to break up the country.
The clashes at the Baiji refinery, 130 miles north of Baghdad, came after an agreement collapsed between workers and tribesmen affiliated with insurgents from Islamic State of Iraq and Syria (ISIS), according to state oil officials and refinery workers.
The deal meant oil was still pumped to the facility last week even though militants controlling the surrounding area could hijack tankers and cut off pipelines, effectively controlling output, they said.
In Baghdad, military and security officials denied that the facility had fallen out of government hands. Gen. Qassim Atta, a military spokesman, said on Iraqiya television that the refinery was entirely under government control and that 40 insurgents had been killed as security forces repelled their advance Wednesday. Atta's claims of government gains have conflicted with accounts from the ground in the past.
But regardless of whether the state manages to retain its grip on the refinery plant itself, it will remain offline as long as militants surrounding the facility can direct its output.
The shutdown could also prevent ISIS from supplying basic services in territory it now controls. Without the ability to provide fuel to power plants or distribute gasoline, the group could have a more difficult time building support from the civilian population.
As the northern city of Mosul fell to insurgents on June 10, tribesmen affiliated with ISIS negotiated with workers at Baiji to keep the oil pumping, according to an employee at the refinery and two senior officials from North Oil Company, who spoke on the condition of anonymity because of they were not authorized to speak publicly.
Seemingly unaware of the situation, Iraq's Oil Ministry continued to supply crude oil from Kirkuk until Friday, when the supply was cut, they said.
State Department spokeswoman Jen Psaki confirmed that production at the plant had stopped for several days due to "a combination of technical and security reasons."
A domestic oil facility, the shutdown has little impact on crude exports, she said.
With the plant no longer running, ISIS launched an assault Wednesday morning. Air force helicopters attempted to repel the attack, which included a volley of mortar fire, and set storage tanks on fire.
Clashes continued Wednesday night, according to workers, indicating that at least some government forces were still holed up inside.
"I don't think their plan is to destroy the refinery," said Kirkuk-based senior official from North Oil Company, who is in regular contact with colleagues from North Refining Company, headquarted in the Baiji complex. "If they had such a plan, they could have done this earlier."
Another Kirkuk-based official from the North Oil Company described the shut down as "an important step taken to prevent the terrorists from using the fuel for their attacks, or to finance their operations."
While taking control of a shuttered refinery plant may be of little use to ISIS in the short term, supplies could be rigged from other oil fields in the future. The facility has the capacity to produce 320,000 barrels of oil a day, out of Iraq's daily production of more than 700,000 barrels.
Foreign workers had already been evacuated in the days leading up to the attack.
The Indian government confirmed Wednesday that 40 Indian construction workers were kidnapped in Mosul, and Turkey said it was investigating reports that 15 Turks were among 60 foreign construction workers abducted by insurgents near the northern city of Kirkuk.
At a late-night meeting Tuesday, Maliki made a gesture toward bridging the sectarian divides in the country, as the United States has pressured him to do as it mulls how to assist him.
The gathering was chaired by Ibrahim al-Jafari, a Shiite leader from Maliki's party who preceded him as prime minister. Some of the country's foremost Shiite members of parliament and three prominent Sunnis were in attendance: speaker of parliament Osama al-Nujaifi; his brother Atheel al-Nujaifi, who is governor of Mosul; and Deputy Prime Minister Saleh al-Mutlak.
A statement issued after the meeting pledged an end to sectarian hate speech, a ban on the carrying of weapons on the street by civilians and a "review" of unspecified political practices in the past.
Ameer al-Kenani, a memeber of parliament with the Shiite cleric Moqtada al-Sadr's Al Ahrar party, said Iran was also pressuring Baghdad to rein in its sectarian tone. But he said Maliki's thin gestures over the past 24 hours were little more than cosmetic.
"We've heard this talk for as almost a decade," Kenani said. "Everybody knows it means nothing."