Boko Haram is believed to be behind the kidnapping of Cameroon’s deputy Prime Minister’s wife.
At least three people were killed in the attack on Sunday involving 200 militants in Kolofata, near the border with Nigeria.
Cameroonian officials said the home of Amadou Ali, the deputy Prime Minister, came under a “savage attack from Boko Haram” and his wife, who was not named, was taken.
The family were at home celebrating Ramadan at the time and security officials managed to take the deputy Prime Minister to safety in a neighbouring town.
A local religious leader, or lamido, named Seini Boukar Lamine, who is also the town's mayor, and five members of his family were also kidnapped in a separate attack on his home.
Boko Haram has not yet claimed responsibility but officials in Cameroon immediately blamed the Islamist group, following a string of cross-border attacks in recent weeks.
A spokesman for Cameroon’s government said the army later took control of Kolofata back from the militants, who had used “brutal and unqualified violence”.
The death toll of the invasion had not been counted.
Cameroon has deployed troops to its northern regions, which borders Boko Haram’s heartland in the north-east of Nigeria, to combat the insurgency.
In April, the group kidnapped almost 300 girls from a school in Chibok and a leader was later filmed claiming they should have been married and that God had told them to sell them as slaves.
In pictures: Nigeria kidnapped schoolgirls
In pictures: Nigeria kidnapped schoolgirls
A total of 276 girls were abducted from the northeastern town of Chibok, in Borno state, which has a sizeable Christian community. Some 223 are still missing
One of the kidnapped girls looks into a camera
One of the missing girls talking to the camera
The missing Nigerian schoolgirls, wearing the full-length hijab and praying in an undisclosed rural location. Boko Haram alleging they had converted them to Islam
Girls wearing the full-length hijab holding a flag reading "There is no god, but Allah" and "Mohammed is Allah's prophet"
A man claiming to be the leader of Nigerian Islamist extremist group Boko Haram Abubakar Shekau
Abubakar Shekau speaks on the video
Girls, wearing the full-length hijab and praying are filmed by an unidentified man (R) in an undisclosed rural location
People carry signs as they attend a protest demanding the release of abducted secondary school girls in the remote village of Chibok in Lagos
A protester demonstrates against the kidnapping of school girls in Nigeria, outside the Nigerian Embassy in London
Chief International Correspondent Christiane Amanpour and Prime Minister David Cameron appearing on the BBC1 current affairs programme
People participate in a "Bring Back Our Girls" campaign demonstration and candlelight vigil in Los Angeles
Girls holding heart shaped banners in a "Bring Back Our Girls" campaign demonstration and candlelight vigil in Los Angeles
14/19 South Africa
South Africans protest in solidarity against the abduction of hundreds of schoolgirls in Nigeria by the Muslim extremist group Boko Haram and what protesters said was the failure of the Nigerian government and international community to rescue them, during a march to the Nigerian Consulate in Johannesburg
Karilyn Coates (10) joins others in a candlelight vigil for the more than 300 girls abducted by Boko Haram in Nigeria, at All Souls Unitarian Church in Colorado Springs
Mothers of the missing Chibok school girls abducted by Boko Haram Islamists gather to receive informations from officials. Nigeria's president said that Boko Haram's mass abduction of more than 200 schoolgirls would mark a turning point in the battle against the Islamists, as world powers joined the search to rescue the hostages
Former Nigerian Education Minister and Vice-President of the World Bank's Africa division (3rd L) Obiageli Ezekwesilieze speaks as she leads a march of Nigeria women and mothers of the kidnapped girls of Chibok, calling for their freedom in Abuja
18/19 Bring Back Our Girls
Kelly Hoppen tweeted: 'Please make sure you do this, we must stand together and not forget them'
19/19 Bring Back Our Girls
E.L. Rock Star tweeted: 'Join The Movement'
Sunday's attack was the third Boko Haram attack in Cameroon since Friday. At least four soldiers were killed in the two previous incursions.
More than 20 suspected militants from the group who had been held in the city of Maroua since March were sentenced to prison sentences ranging from 10 to 20 years on Friday.
Bomb attacks and shootings in Nigeria have killed thousands of people since 2010 and have rapidly increased in frequency this year.
On Sunday, a bomb attack on a Catholic church in northern Nigeria's main city of Kano killed five people and wounded eight, a senior police officer said.
Christian churches have been a favourite target for the militants, who reject anything seen as “Western” and want to establish an Islamic state.
Additional reporting by Reuters