At least five people were killed and eight were injured Sunday in a bomb attack on a church in Kano, northern Nigeria's largest city. The attack came shortly after the end of mass.
Boko Haram militants have a strong presence in northern Nigeria, and they have attacked Christian churches in the past.
Earlier this year, Boko Haram kidnapped over 200 Nigerian school girls. The terrorist group later released a video claiming that the girls had converted to Islam.
Also on Sunday, five Nigerian police officers were injured when a female suicide bomber blew herself up outside a university in Kano after police prevented her from carrying out an attack.
A police spokesman said that suicide bomber had hidden the bomb under her "long black hijab". Police noticed the woman acting strangely, and they were about to ask a female officer to frisk the woman when she detonated the bomb, he said.
The latest attacks follow two previous attacks in Kano, including a bomb attack last month at a university which left at least eight people dead.
Elsewhere, Boko Haram militants abducted the wife of Cameroon's vice Prime Minister in the north Cameroon town of Kolofata, which is situated near the country's border with Nigeria. The terrorists also kidnapped a local religious leader - who also serves as the Town's mayor - and five members of his family. At least three people were killed in the cross-border attack.
Boko Haram recently stepped up its cross-border attacks into Cameroon after Cameroon signed an agreement with several West African nations to organize a joint force to combat Boko Haram.