The individuals who promote insurrection in Nigeria face a "rude shock", the country's president warned on Tuesday, raising the possibility of a fierce crackdown on rising violence in the southeast that has included arson attacks on a police station and electoral offices.

Iran Press/Africa: Security forces are already grappling with criminal gangs in the northwest who carry out mass kidnappings for ransom, a decade-old Islamist insurgency in the northeast, and piracy in the Gulf of Guinea off Nigeria's southern coast, Reuters reported.

Electoral offices and police stations have been burned down in recent months across the southeast, a region where armed gangs have carried out a series of killings of police officers, prompting a police operation in May. 

Nigerian authorities have blamed those attacks on a banned separatist group, the Indigenous People of Biafra (IPOB), and what police call its armed wing, the Eastern Security Network. But the IPOB has repeatedly denied involvement.

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