Tunisia said on Thursday it had arrested four militants and seized arms and explosives in the southern town of Sidi Bouzid following increased security checks prompted by fears of attacks by radical Islamists during New Year celebrations.

The detentions followed the arrest of seven Salafists, or ultra-conservative Islamists, on Sunday in the western town of Kasserine.

“The national police arrested four terrorists belonging to a banned organization on Wednesday night. A Kalashnikov piece, munitions and explosives were seized during the operation,” Tunisia’s interior ministry said in a statement.