Gunmen kidnapped four people from a house in the university town of Keffi, in Nasarawa state, police said on Tuesday.

Kidnapping for ransom is rife in Nigeria, but attacks have mostly been in the northwest region where armed men have targeted university students.

Nasarawa police spokesperson Rahman Nansel said police received a distress call at about 0155 GMT on Tuesday after armed men invaded a house in Angwan Kaare community and responded with the military, but the kidnappers had already fled with their victims.

"The Commissioner of Police has ordered a manhunt for the culprits with a view to rescue the four victims unhurt," Nansel said in a statement.

Keffi is about 70 km (43 miles) east of Abuja, the Nigerian capital.

Kidnapping for ransom is part of widespread insecurity in Nigeria. Islamist insurgents still carry out deadly attacks in the northeast, violent clashes between herders and farmers continue to claim lives in the central region, and separatists attack security forces in the southeast.