The Islamic State group also published photos of the Jordanian military pilot who was captured last week.
It was not known if the senior leader who was targeted had been killed.
Boko Haram has stepped up its attacks on both sides of the border in recent weeks, raising concerns that it could begin to threaten Cameroon’s security.
The Islamic State group listed demands for Jordan to meet if the country wants the release of its pilot.
The number of people killed by ISIS has more than doubled in recent months.
The veteran of the Iran-Iraq War between 1980 and 1988 was shot by a sniper in Samarra.
The attack on the police comes just a day after Egyptian security forces shot dead two militants of Sinai-based Ansar Bayt al-Maqdis.
The Islamic State group kidnapped the Jordanian pilot on a mission for the U.S.-led coalition in Syria this week.
Backed by the U.S., so-called moderate groups in the north of the country have united and renamed themselves the Levant Front.
Turkey is already training Kurdish peshmerga fighters in northern Iraq to help them fight ISIS, which controls territory in Iraq and Syria.
U.S. commanders said that the group was trying to "misrepresent ... this unfortunate aircraft crash for their own purposes."
Pakistan's Prime Minister Nawaz Sharif outlined a 20-point plan to combat terrorism in the wake of the deadly Peshawar school attacks.
Several of the air raids targeted Islamic State positions near the Kurdish border town of Kobani, Syria.
The Naval Criminal Investigative Service is investigating O'Neill over allegations that he may have leaked classified information.
For the first time, the Islamic State shot down a coalition warplane - and captured the pilot.
A cafe in Sydney was the scene of a hostage crisis last week, which ended with the death of two hostages and the hostage-taker.
Whether radical Islam played a role in the France car attacks is being investigated.
The Jund al-Khilafa group had kidnapped Gourdel, 55, in September and later that month released a video showing his execution.
Al Qaeda's Indian franchise said in a statement it is "forbidden to target ... places where ordinary Muslims could be harmed."
There's a reportedly growing discontent among jihadists who left their home countries to fight for ISIS, but the group won't let them leave.
Umar Mansoor, considered to be the mastermind behind the Peshawar attacks, has warned of more attacks if anti-terrorism operations continue.
Zaki-ur-Rehman Lakhvi's bail order comes just two days after terrorists killed over 130 school children in Peshawar, Pakistan.